Add ShaderBuilders to EmitArgs and remove gettings from ProgBuilder.

src/gpu/glsl/GrGLSLXferProcessor.cpp

Index: src/gpu/glsl/GrGLSLXferProcessor.cpp
diff --git a/src/gpu/glsl/GrGLSLXferProcessor.cpp b/src/gpu/glsl/GrGLSLXferProcessor.cpp
index 38f2e6a131d9acffec2e8d84b3e72626d3ee75d1..4d2ec1074b381b800721a7ffb995cc67b72c21a9 100644
--- a/src/gpu/glsl/GrGLSLXferProcessor.cpp
+++ b/src/gpu/glsl/GrGLSLXferProcessor.cpp
@@ -18,8 +18,8 @@ void GrGLSLXferProcessor::emitCode(const EmitArgs& args) {
         return;
     }
 
-    GrGLSLXPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder();
-    const char* dstColor = fsBuilder->dstColor();
+    GrGLSLXPFragmentBuilder* fragBuilder = args.fXPFragBuilder;
+    const char* dstColor = fragBuilder->dstColor();
 
     if (args.fXP.getDstTexture()) {
         bool topDown = kTopLeft_GrSurfaceOrigin == args.fXP.getDstTexture()->origin();
@@ -27,9 +27,9 @@ void GrGLSLXferProcessor::emitCode(const EmitArgs& args) {
         if (args.fXP.readsCoverage()) {
             // We don't think any shaders actually output negative coverage, but just as a safety
             // check for floating point precision errors we compare with <= here
-            fsBuilder->codeAppendf("if (all(lessThanEqual(%s, vec4(0)))) {"
-                                   "    discard;"
-                                   "}", args.fInputCoverage);
+            fragBuilder->codeAppendf("if (all(lessThanEqual(%s, vec4(0)))) {"
+                                     "    discard;"
+                                     "}", args.fInputCoverage);
         }
 
         const char* dstTopLeftName;
@@ -45,36 +45,40 @@ void GrGLSLXferProcessor::emitCode(const EmitArgs& args) {
                                             kDefault_GrSLPrecision,
                                             "DstTextureCoordScale",
                                             &dstCoordScaleName);
-        const char* fragPos = fsBuilder->fragmentPosition();
+        const char* fragPos = fragBuilder->fragmentPosition();
 
-        fsBuilder->codeAppend("// Read color from copy of the destination.\n");
-        fsBuilder->codeAppendf("vec2 _dstTexCoord = (%s.xy - %s) * %s;",
-                               fragPos, dstTopLeftName, dstCoordScaleName);
+        fragBuilder->codeAppend("// Read color from copy of the destination.\n");
+        fragBuilder->codeAppendf("vec2 _dstTexCoord = (%s.xy - %s) * %s;",
+                                 fragPos, dstTopLeftName, dstCoordScaleName);
 
         if (!topDown) {
-            fsBuilder->codeAppend("_dstTexCoord.y = 1.0 - _dstTexCoord.y;");
+            fragBuilder->codeAppend("_dstTexCoord.y = 1.0 - _dstTexCoord.y;");
         }
 
-        fsBuilder->codeAppendf("vec4 %s = ", dstColor);
-        fsBuilder->appendTextureLookup(args.fSamplers[0], "_dstTexCoord", kVec2f_GrSLType);
-        fsBuilder->codeAppend(";");
+        fragBuilder->codeAppendf("vec4 %s = ", dstColor);
+        fragBuilder->appendTextureLookup(args.fSamplers[0], "_dstTexCoord", kVec2f_GrSLType);
+        fragBuilder->codeAppend(";");
     }
 
-    this->emitBlendCodeForDstRead(args.fPB, args.fInputColor, dstColor, args.fOutputPrimary,
+    this->emitBlendCodeForDstRead(args.fPB,
+                                  fragBuilder,
+                                  args.fInputColor,
+                                  dstColor,
+                                  args.fOutputPrimary,
                                   args.fXP);
 
     // Apply coverage.
     if (args.fXP.dstReadUsesMixedSamples()) {
         if (args.fXP.readsCoverage()) {
-            fsBuilder->codeAppendf("%s *= %s;", args.fOutputPrimary, args.fInputCoverage);
-            fsBuilder->codeAppendf("%s = %s;", args.fOutputSecondary, args.fInputCoverage);
+            fragBuilder->codeAppendf("%s *= %s;", args.fOutputPrimary, args.fInputCoverage);
+            fragBuilder->codeAppendf("%s = %s;", args.fOutputSecondary, args.fInputCoverage);
         } else {
-            fsBuilder->codeAppendf("%s = vec4(1.0);", args.fOutputSecondary);
+            fragBuilder->codeAppendf("%s = vec4(1.0);", args.fOutputSecondary);
         }
     } else if (args.fXP.readsCoverage()) {
-        fsBuilder->codeAppendf("%s = %s * %s + (vec4(1.0) - %s) * %s;",
-                               args.fOutputPrimary, args.fInputCoverage,
-                               args.fOutputPrimary, args.fInputCoverage, dstColor);
+        fragBuilder->codeAppendf("%s = %s * %s + (vec4(1.0) - %s) * %s;",
+                                 args.fOutputPrimary, args.fInputCoverage,
+                                 args.fOutputPrimary, args.fInputCoverage, dstColor);
     }
 }