Down integrate from Google internal branch for C++ and Java.

- Maps for C++ lite
- C++ Arena optimizations.
- Java Lite runtime code size optimization.

Change-Id: I7537a4357c1cb385d23f9e8aa7ffdfeefe079f13

1 files changed, 23 insertions, 0 deletions

diff --git a/src/google/protobuf/map_unittest.proto b/src/google/protobuf/map_unittest.proto
index 9232d58f..830f672b 100644
--- a/src/google/protobuf/map_unittest.proto
+++ b/src/google/protobuf/map_unittest.proto
@@ -30,6 +30,7 @@
 
 syntax = "proto3";
 
+option cc_enable_arenas = true;
 
 import "google/protobuf/unittest.proto";
 
@@ -59,6 +60,10 @@ message TestMap {
   map<int32   , ForeignMessage> map_int32_foreign_message = 17;
 }
 
+message TestMapSubmessage {
+  optional TestMap test_map = 1;
+}
+
 message TestMessageMap {
   map<int32, TestAllTypes> map_int32_message = 1;
 }
@@ -80,3 +85,21 @@ enum MapEnum {
 message TestRequiredMessageMap {
   map<int32, TestRequired> map_field = 1;
 }
+
+message TestArenaMap {
+  map<int32   , int32   > map_int32_int32       = 1;
+  map<int64   , int64   > map_int64_int64       = 2;
+  map<uint32  , uint32  > map_uint32_uint32     = 3;
+  map<uint64  , uint64  > map_uint64_uint64     = 4;
+  map<sint32  , sint32  > map_sint32_sint32     = 5;
+  map<sint64  , sint64  > map_sint64_sint64     = 6;
+  map<fixed32 , fixed32 > map_fixed32_fixed32   = 7;
+  map<fixed64 , fixed64 > map_fixed64_fixed64   = 8;
+  map<sfixed32, sfixed32> map_sfixed32_sfixed32 = 9;
+  map<sfixed64, sfixed64> map_sfixed64_sfixed64 = 10;
+  map<int32   , float   > map_int32_float       = 11;
+  map<int32   , double  > map_int32_double      = 12;
+  map<bool    , bool    > map_bool_bool         = 13;
+  map<int32   , MapEnum > map_int32_enum        = 14;
+  map<int32   , ForeignMessage> map_int32_foreign_message = 15;
+}