Merge branch 'cleaner-posix2' into cleaner-posix3

14 files changed, 790 insertions, 118 deletions

diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index 809a822df3..8fc20626b7 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -282,6 +282,8 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h" />
   </ItemGroup>
   <ItemGroup>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\load_balancer_api.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\proto\grpc\lb\v0\load_balancer.pb.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\alpn.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_encoder.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\chttp2_transport.h" />
@@ -321,9 +323,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\client_config.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\connector.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\initial_connect_string.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\load_balancer_api.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\pick_first.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\round_robin.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policy.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policy_factory.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policy_registry.h" />
@@ -355,9 +354,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_internal.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set_windows.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_windows.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\resolve_address.h" />
@@ -385,7 +382,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\json\json_common.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\json\json_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\json\json_writer.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\proto\grpc\lb\v0\load_balancer.pb.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\security\auth_filters.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\security\b64.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\security\credentials.h" />
@@ -427,6 +423,14 @@
     <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_encode.h" />
   </ItemGroup>
   <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\load_balancer_api.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\proto\grpc\lb\v0\load_balancer.pb.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\pick_first\pick_first.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\round_robin\round_robin.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\insecure\channel_create.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\secure\secure_channel_create.c">
@@ -521,12 +525,6 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\initial_connect_string.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\load_balancer_api.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\pick_first.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\round_robin.c">
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policy.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policy_factory.c">
@@ -653,8 +651,6 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\json\json_writer.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\proto\grpc\lb\v0\load_balancer.pb.c">
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\b64.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\client_auth_filter.c">
@@ -745,6 +741,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\tsi\transport_security.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\plugin_registry\grpc_plugin_registry.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_common.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_decode.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 25dc242a29..c6a8114836 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -1,6 +1,18 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\load_balancer_api.c">
+      <Filter>src\core\ext\lb_policy\grpclb</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\proto\grpc\lb\v0\load_balancer.pb.c">
+      <Filter>src\core\ext\lb_policy\grpclb\proto\grpc\lb\v0</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\pick_first\pick_first.c">
+      <Filter>src\core\ext\lb_policy\pick_first</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\round_robin\round_robin.c">
+      <Filter>src\core\ext\lb_policy\round_robin</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\insecure\channel_create.c">
       <Filter>src\core\ext\transport\chttp2\client\insecure</Filter>
     </ClCompile>
@@ -142,15 +154,6 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\initial_connect_string.c">
       <Filter>src\core\lib\client_config</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\load_balancer_api.c">
-      <Filter>src\core\lib\client_config\lb_policies</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\pick_first.c">
-      <Filter>src\core\lib\client_config\lb_policies</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\round_robin.c">
-      <Filter>src\core\lib\client_config\lb_policies</Filter>
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policy.c">
       <Filter>src\core\lib\client_config</Filter>
     </ClCompile>
@@ -340,9 +343,6 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\json\json_writer.c">
       <Filter>src\core\lib\json</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\proto\grpc\lb\v0\load_balancer.pb.c">
-      <Filter>src\core\lib\proto\grpc\lb\v0</Filter>
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\security\b64.c">
       <Filter>src\core\lib\security</Filter>
     </ClCompile>
@@ -478,6 +478,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\tsi\transport_security.c">
       <Filter>src\core\lib\tsi</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\plugin_registry\grpc_plugin_registry.c">
+      <Filter>src\core\plugin_registry</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_common.c">
       <Filter>third_party\nanopb</Filter>
     </ClCompile>
@@ -530,6 +533,12 @@
     </ClInclude>
   </ItemGroup>
   <ItemGroup>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\load_balancer_api.h">
+      <Filter>src\core\ext\lb_policy\grpclb</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\proto\grpc\lb\v0\load_balancer.pb.h">
+      <Filter>src\core\ext\lb_policy\grpclb\proto\grpc\lb\v0</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\alpn.h">
       <Filter>src\core\ext\transport\chttp2\transport</Filter>
     </ClInclude>
@@ -647,15 +656,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\initial_connect_string.h">
       <Filter>src\core\lib\client_config</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\load_balancer_api.h">
-      <Filter>src\core\lib\client_config\lb_policies</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\pick_first.h">
-      <Filter>src\core\lib\client_config\lb_policies</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\round_robin.h">
-      <Filter>src\core\lib\client_config\lb_policies</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policy.h">
       <Filter>src\core\lib\client_config</Filter>
     </ClInclude>
@@ -749,15 +749,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_posix.h">
-      <Filter>src\core\lib\iomgr</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set_posix.h">
-      <Filter>src\core\lib\iomgr</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set_windows.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
@@ -839,9 +833,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\json\json_writer.h">
       <Filter>src\core\lib\json</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\proto\grpc\lb\v0\load_balancer.pb.h">
-      <Filter>src\core\lib\proto\grpc\lb\v0</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\security\auth_filters.h">
       <Filter>src\core\lib\security</Filter>
     </ClInclude>
@@ -983,6 +974,30 @@
     <Filter Include="src\core\ext">
       <UniqueIdentifier>{3f32a58f-394f-5f13-06aa-6cc52cc2daaf}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\ext\lb_policy">
+      <UniqueIdentifier>{030f00ff-6c54-76c8-12df-37e3008335d1}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\ext\lb_policy\grpclb">
+      <UniqueIdentifier>{fe41339e-53fb-39b3-7457-7a0fbb238dbe}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\ext\lb_policy\grpclb\proto">
+      <UniqueIdentifier>{a7c27f6b-6d15-01cf-76d9-c30dddea0990}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\ext\lb_policy\grpclb\proto\grpc">
+      <UniqueIdentifier>{bc714e6d-8aba-91df-7db9-7f189f05a6ff}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\ext\lb_policy\grpclb\proto\grpc\lb">
+      <UniqueIdentifier>{adf7e553-94ef-14fd-e845-03104f00a06f}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\ext\lb_policy\grpclb\proto\grpc\lb\v0">
+      <UniqueIdentifier>{0406d191-8817-38c3-a562-e3541201f424}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\ext\lb_policy\pick_first">
+      <UniqueIdentifier>{b63ded00-b24f-708e-333f-ce199e421875}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\ext\lb_policy\round_robin">
+      <UniqueIdentifier>{2472d352-cf94-f317-646e-72b769cea846}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\core\ext\transport">
       <UniqueIdentifier>{e3abfd0a-064e-0f2f-c8e8-7c5a7e98142a}</UniqueIdentifier>
     </Filter>
@@ -1022,9 +1037,6 @@
     <Filter Include="src\core\lib\client_config">
       <UniqueIdentifier>{2f3260de-be57-d18d-6882-61d115baa159}</UniqueIdentifier>
     </Filter>
-    <Filter Include="src\core\lib\client_config\lb_policies">
-      <UniqueIdentifier>{118d2bb5-086f-54f3-11de-26d7d7f73f9d}</UniqueIdentifier>
-    </Filter>
     <Filter Include="src\core\lib\client_config\resolvers">
       <UniqueIdentifier>{b9d8db6c-2c68-1c90-fe5e-37da90f47ae6}</UniqueIdentifier>
     </Filter>
@@ -1043,18 +1055,6 @@
     <Filter Include="src\core\lib\json">
       <UniqueIdentifier>{cb2b0073-f2a7-5c63-d182-8874b24bdf36}</UniqueIdentifier>
     </Filter>
-    <Filter Include="src\core\lib\proto">
-      <UniqueIdentifier>{b4b19f9a-1575-8a21-0bca-537746f858b7}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="src\core\lib\proto\grpc">
-      <UniqueIdentifier>{cbc8ce67-4a97-d533-8dc3-f949c63e2771}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="src\core\lib\proto\grpc\lb">
-      <UniqueIdentifier>{933530ae-447b-ea8d-3531-98f0556960b0}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="src\core\lib\proto\grpc\lb\v0">
-      <UniqueIdentifier>{c33f944f-37d4-42fd-abc3-61f0d4400462}</UniqueIdentifier>
-    </Filter>
     <Filter Include="src\core\lib\security">
       <UniqueIdentifier>{c4661d64-349f-01c1-1ba8-0602f9047595}</UniqueIdentifier>
     </Filter>
@@ -1070,6 +1070,9 @@
     <Filter Include="src\core\lib\tsi">
       <UniqueIdentifier>{95ad2811-c8d0-7a42-2a73-baf03fcbf699}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\plugin_registry">
+      <UniqueIdentifier>{02bec99b-ff39-88d7-9dea-e0ff9f4a2701}</UniqueIdentifier>
+    </Filter>
     <Filter Include="third_party">
       <UniqueIdentifier>{aaab30a4-2a15-732e-c141-3fbc0f0f5a7a}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index a5cf362629..7a2abdea6b 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -272,6 +272,8 @@
     <ClInclude Include="$(SolutionDir)\..\include\grpc\status.h" />
   </ItemGroup>
   <ItemGroup>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\load_balancer_api.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\proto\grpc\lb\v0\load_balancer.pb.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\alpn.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\bin_encoder.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\chttp2_transport.h" />
@@ -311,9 +313,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\client_config.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\connector.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\initial_connect_string.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\load_balancer_api.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\pick_first.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\round_robin.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policy.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policy_factory.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policy_registry.h" />
@@ -345,9 +344,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_internal.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set_windows.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_windows.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\resolve_address.h" />
@@ -375,7 +372,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\json\json_common.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\json\json_reader.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\json\json_writer.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\proto\grpc\lb\v0\load_balancer.pb.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\statistics\census_interface.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\statistics\census_rpc_stats.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\surface\api_trace.h" />
@@ -403,6 +399,14 @@
     <ClInclude Include="$(SolutionDir)\..\third_party\nanopb\pb_encode.h" />
   </ItemGroup>
   <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\load_balancer_api.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\proto\grpc\lb\v0\load_balancer.pb.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\pick_first\pick_first.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\round_robin\round_robin.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\insecure\channel_create.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\server\insecure\server_chttp2.c">
@@ -493,12 +497,6 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\initial_connect_string.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\load_balancer_api.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\pick_first.c">
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\round_robin.c">
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policy.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policy_factory.c">
@@ -623,8 +621,6 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\json\json_writer.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\proto\grpc\lb\v0\load_balancer.pb.c">
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\alarm.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\api_trace.c">
@@ -681,6 +677,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\transport\transport_op_string.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\plugin_registry\grpc_unsecure_plugin_registry.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_common.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_decode.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index a4e6a79ff8..20b8ffd36e 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -1,6 +1,18 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\load_balancer_api.c">
+      <Filter>src\core\ext\lb_policy\grpclb</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\proto\grpc\lb\v0\load_balancer.pb.c">
+      <Filter>src\core\ext\lb_policy\grpclb\proto\grpc\lb\v0</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\pick_first\pick_first.c">
+      <Filter>src\core\ext\lb_policy\pick_first</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\ext\lb_policy\round_robin\round_robin.c">
+      <Filter>src\core\ext\lb_policy\round_robin</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\client\insecure\channel_create.c">
       <Filter>src\core\ext\transport\chttp2\client\insecure</Filter>
     </ClCompile>
@@ -136,15 +148,6 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\initial_connect_string.c">
       <Filter>src\core\lib\client_config</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\load_balancer_api.c">
-      <Filter>src\core\lib\client_config\lb_policies</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\pick_first.c">
-      <Filter>src\core\lib\client_config\lb_policies</Filter>
-    </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\round_robin.c">
-      <Filter>src\core\lib\client_config\lb_policies</Filter>
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policy.c">
       <Filter>src\core\lib\client_config</Filter>
     </ClCompile>
@@ -331,9 +334,6 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\json\json_writer.c">
       <Filter>src\core\lib\json</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\lib\proto\grpc\lb\v0\load_balancer.pb.c">
-      <Filter>src\core\lib\proto\grpc\lb\v0</Filter>
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\surface\alarm.c">
       <Filter>src\core\lib\surface</Filter>
     </ClCompile>
@@ -418,6 +418,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\transport\transport_op_string.c">
       <Filter>src\core\lib\transport</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\plugin_registry\grpc_unsecure_plugin_registry.c">
+      <Filter>src\core\plugin_registry</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\third_party\nanopb\pb_common.c">
       <Filter>third_party\nanopb</Filter>
     </ClCompile>
@@ -467,6 +470,12 @@
     </ClInclude>
   </ItemGroup>
   <ItemGroup>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\load_balancer_api.h">
+      <Filter>src\core\ext\lb_policy\grpclb</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\ext\lb_policy\grpclb\proto\grpc\lb\v0\load_balancer.pb.h">
+      <Filter>src\core\ext\lb_policy\grpclb\proto\grpc\lb\v0</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\ext\transport\chttp2\transport\alpn.h">
       <Filter>src\core\ext\transport\chttp2\transport</Filter>
     </ClInclude>
@@ -584,15 +593,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\initial_connect_string.h">
       <Filter>src\core\lib\client_config</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\load_balancer_api.h">
-      <Filter>src\core\lib\client_config\lb_policies</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\pick_first.h">
-      <Filter>src\core\lib\client_config\lb_policies</Filter>
-    </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policies\round_robin.h">
-      <Filter>src\core\lib\client_config\lb_policies</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\client_config\lb_policy.h">
       <Filter>src\core\lib\client_config</Filter>
     </ClInclude>
@@ -686,15 +686,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_posix.h">
-      <Filter>src\core\lib\iomgr</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set_posix.h">
-      <Filter>src\core\lib\iomgr</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset_set_windows.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
@@ -776,9 +770,6 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\json\json_writer.h">
       <Filter>src\core\lib\json</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\lib\proto\grpc\lb\v0\load_balancer.pb.h">
-      <Filter>src\core\lib\proto\grpc\lb\v0</Filter>
-    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\statistics\census_interface.h">
       <Filter>src\core\lib\statistics</Filter>
     </ClInclude>
@@ -878,6 +869,30 @@
     <Filter Include="src\core\ext">
       <UniqueIdentifier>{82f86e8c-00a4-f566-d235-670fc629798d}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\ext\lb_policy">
+      <UniqueIdentifier>{a23781d2-27e4-7cb0-12cd-59782ecb21ce}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\ext\lb_policy\grpclb">
+      <UniqueIdentifier>{25a465c8-d1e8-6248-c005-bb2062206472}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\ext\lb_policy\grpclb\proto">
+      <UniqueIdentifier>{40fc2615-d244-0d36-4486-ba6f0fa468bb}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\ext\lb_policy\grpclb\proto\grpc">
+      <UniqueIdentifier>{1d129f24-a399-12ef-68de-023aff7dde52}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\ext\lb_policy\grpclb\proto\grpc\lb">
+      <UniqueIdentifier>{21858d9d-30b5-8847-5882-6b47df0fa293}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\ext\lb_policy\grpclb\proto\grpc\lb\v0">
+      <UniqueIdentifier>{1795a20b-3e7c-e27d-eae1-96582fa9a958}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\ext\lb_policy\pick_first">
+      <UniqueIdentifier>{e27f9ecf-97bb-1a2e-3135-a41f732dcf55}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="src\core\ext\lb_policy\round_robin">
+      <UniqueIdentifier>{e5fc1091-5d60-404f-775b-686ef4b3266f}</UniqueIdentifier>
+    </Filter>
     <Filter Include="src\core\ext\transport">
       <UniqueIdentifier>{967c89fe-c97c-27e2-aac0-9ba5854cb5fa}</UniqueIdentifier>
     </Filter>
@@ -911,9 +926,6 @@
     <Filter Include="src\core\lib\client_config">
       <UniqueIdentifier>{29ca2974-89e4-1a74-3e4d-0d63e2f77566}</UniqueIdentifier>
     </Filter>
-    <Filter Include="src\core\lib\client_config\lb_policies">
-      <UniqueIdentifier>{6c7e36d4-6117-e0cd-c886-b9eb3c994927}</UniqueIdentifier>
-    </Filter>
     <Filter Include="src\core\lib\client_config\resolvers">
       <UniqueIdentifier>{2d959ef9-9703-dc92-a56f-9fe136dadfb9}</UniqueIdentifier>
     </Filter>
@@ -932,18 +944,6 @@
     <Filter Include="src\core\lib\json">
       <UniqueIdentifier>{681cdaeb-c47f-8853-d985-bf13c2873947}</UniqueIdentifier>
     </Filter>
-    <Filter Include="src\core\lib\proto">
-      <UniqueIdentifier>{4bfbd6c6-f6a8-c6b3-5186-b788f4e11e23}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="src\core\lib\proto\grpc">
-      <UniqueIdentifier>{60f3ab7d-ea44-348f-671e-77fdebbd18bb}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="src\core\lib\proto\grpc\lb">
-      <UniqueIdentifier>{bcd33510-32e7-c2fb-e11d-a3655f97bc84}</UniqueIdentifier>
-    </Filter>
-    <Filter Include="src\core\lib\proto\grpc\lb\v0">
-      <UniqueIdentifier>{bb9b8c80-9eff-5ab6-5b29-c2d54f0fc192}</UniqueIdentifier>
-    </Filter>
     <Filter Include="src\core\lib\statistics">
       <UniqueIdentifier>{d0ab6d54-ae25-fc49-3656-91d9db57366a}</UniqueIdentifier>
     </Filter>
@@ -953,6 +953,9 @@
     <Filter Include="src\core\lib\transport">
       <UniqueIdentifier>{6c3394d1-27e9-003e-19ed-8116d210f7cc}</UniqueIdentifier>
     </Filter>
+    <Filter Include="src\core\plugin_registry">
+      <UniqueIdentifier>{babf0a90-e934-f599-5475-e6937d9580fe}</UniqueIdentifier>
+    </Filter>
     <Filter Include="third_party">
       <UniqueIdentifier>{025c051e-8eba-125b-67f9-173f95176eb2}</UniqueIdentifier>
     </Filter>
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj
index 568a0515aa..d54d21b66e 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj
@@ -185,6 +185,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\hpack_size.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\idempotent_request.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\invoke_large_request.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\large_metadata.c">
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters
index ecc23e868d..99622e228d 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_nosec_tests/end2end_nosec_tests.vcxproj.filters
@@ -52,6 +52,9 @@
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\hpack_size.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\idempotent_request.c">
+      <Filter>test\core\end2end\tests</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\invoke_large_request.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj
index 3e0092ef87..c0b21c9ae1 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj
@@ -187,6 +187,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\hpack_size.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\idempotent_request.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\invoke_large_request.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\large_metadata.c">
diff --git a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters
index c3aabc48a0..791589863e 100644
--- a/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters
+++ b/vsprojects/vcxproj/test/end2end/tests/end2end_tests/end2end_tests.vcxproj.filters
@@ -55,6 +55,9 @@
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\hpack_size.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\idempotent_request.c">
+      <Filter>test\core\end2end\tests</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\end2end\tests\invoke_large_request.c">
       <Filter>test\core\end2end\tests</Filter>
     </ClCompile>
diff --git a/vsprojects/vcxproj/test/internal_api_canary_iomgr_test/internal_api_canary_iomgr_test.vcxproj b/vsprojects/vcxproj/test/internal_api_canary_iomgr_test/internal_api_canary_iomgr_test.vcxproj
new file mode 100644
index 0000000000..11d89a01c1
--- /dev/null
+++ b/vsprojects/vcxproj/test/internal_api_canary_iomgr_test/internal_api_canary_iomgr_test.vcxproj
@@ -0,0 +1,199 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\1.0.204.1.props')" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{28AE726B-1BFB-202B-48D2-41AF9D09B9EA}</ProjectGuid>
+    <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
+    <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
+    <PlatformToolset>v100</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '14.0'" Label="Configuration">
+    <PlatformToolset>v140</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="$(SolutionDir)\..\vsprojects\global.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\openssl.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\winsock.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\zlib.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'">
+    <TargetName>internal_api_canary_iomgr_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
+    <TargetName>internal_api_canary_iomgr_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Release</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Release</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+  <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\test\core\internal_api_canaries\iomgr.c">
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc_test_util\grpc_test_util.vcxproj">
+      <Project>{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\grpc\grpc.vcxproj">
+      <Project>{29D16885-7228-4C31-81ED-5F9187C7F2A9}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr_test_util\gpr_test_util.vcxproj">
+      <Project>{EAB0A629-17A9-44DB-B5FF-E91A721FE037}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\gpr\gpr.vcxproj">
+      <Project>{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
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+  </ImportGroup>
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
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new file mode 100644
index 0000000000..f1ee82d1f4
--- /dev/null
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new file mode 100644
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--- /dev/null
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new file mode 100644
index 0000000000..f7f4e3200e
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diff --git a/vsprojects/vcxproj/test/internal_api_canary_transport_test/internal_api_canary_transport_test.vcxproj.filters b/vsprojects/vcxproj/test/internal_api_canary_transport_test/internal_api_canary_transport_test.vcxproj.filters
new file mode 100644
index 0000000000..1e0b4c5557
--- /dev/null
+++ b/vsprojects/vcxproj/test/internal_api_canary_transport_test/internal_api_canary_transport_test.vcxproj.filters
@@ -0,0 +1,21 @@
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