Revert "sksl fragment processor support"

This reverts commit ccf59917d3fe7aaf59de714acfbd0596503f324f.

Reason for revert: breaking iOS bots

Original change's description:
> sksl fragment processor support
> 
> Bug: skia:
> Change-Id: Ia3b0305c2b0c78074303831f628fb01852b90d34
> Reviewed-on: https://skia-review.googlesource.com/17843
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
> Reviewed-by: Ben Wagner <benjaminwagner@google.com>
> Reviewed-by: Mike Klein <mtklein@google.com>

TBR=mtklein@google.com,benjaminwagner@google.com,ethannicholas@google.com

Change-Id: I0a33060c7c42c7b44c5c13d443ac42958291c2f1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/20962
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

1 files changed, 4 insertions, 35 deletions

diff --git a/src/sksl/ir/SkSLLayout.h b/src/sksl/ir/SkSLLayout.h
index 8bf0472a95..3a8416ac4e 100644
--- a/src/sksl/ir/SkSLLayout.h
+++ b/src/sksl/ir/SkSLLayout.h
@@ -8,7 +8,6 @@
 #ifndef SKSL_LAYOUT
 #define SKSL_LAYOUT
 
-#include "SkSLString.h"
 #include "SkSLUtil.h"
 
 namespace SkSL {
@@ -43,16 +42,6 @@ struct Layout {
         kR8I,
     };
 
-    // used by SkSL processors
-    enum Key {
-        // field is not a key
-        kNo_Key,
-        // field is a key
-        kKey_Key,
-        // key is 0 or 1 depending on whether the matrix is an identity matrix
-        kIdentity_Key,
-    };
-
     static const char* FormatToStr(Format format) {
         switch (format) {
             case Format::kUnspecified:  return "";
@@ -66,6 +55,7 @@ struct Layout {
             case Format::kR8I:          return "r8i";
         }
         ABORT("Unexpected format");
+        return "";
     }
 
     static bool ReadFormat(String str, Format* format) {
@@ -100,7 +90,7 @@ struct Layout {
     Layout(int location, int offset, int binding, int index, int set, int builtin,
            int inputAttachmentIndex, bool originUpperLeft, bool overrideCoverage,
            bool blendSupportAllEquations, Format format, bool pushconstant, Primitive primitive,
-           int maxVertices, int invocations, String when, Key key)
+           int maxVertices, int invocations)
     : fLocation(location)
     , fOffset(offset)
     , fBinding(binding)
@@ -115,9 +105,7 @@ struct Layout {
     , fPushConstant(pushconstant)
     , fPrimitive(primitive)
     , fMaxVertices(maxVertices)
-    , fInvocations(invocations)
-    , fWhen(when)
-    , fKey(key) {}
+    , fInvocations(invocations) {}
 
     Layout()
     : fLocation(-1)
@@ -134,8 +122,7 @@ struct Layout {
     , fPushConstant(false)
     , fPrimitive(kUnspecified_Primitive)
     , fMaxVertices(-1)
-    , fInvocations(-1)
-    , fKey(kNo_Key) {}
+    , fInvocations(-1) {}
 
     String description() const {
         String result;
@@ -228,22 +215,6 @@ struct Layout {
             result += separator + "invocations = " + to_string(fInvocations);
             separator = ", ";
         }
-        if (fWhen.size()) {
-            result += separator + "when = " + fWhen;
-            separator = ", ";
-        }
-        switch (fKey) {
-            case kNo_Key:
-                break;
-            case kKey_Key:
-                result += separator + "key";
-                separator = ", ";
-                break;
-            case kIdentity_Key:
-                result += separator + "key=identity";
-                separator = ", ";
-                break;
-        }
         if (result.size() > 0) {
             result = "layout (" + result + ")";
         }
@@ -290,8 +261,6 @@ struct Layout {
     Primitive fPrimitive;
     int fMaxVertices;
     int fInvocations;
-    String fWhen;
-    Key fKey;
 };
 
 } // namespace