Add processor name to comment when printing out shaders.

src/gpu/gl/builders/GrGLProgramBuilder.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLProgramBuilder.h"
 #include "gl/GrGLProgram.h"
 #include "gl/GrGLSLPrettyPrint.h"
@@ skipping 278 matching lines @@
     if (output->isValid()) {
         outColorName = output->c_str();
     } else {
         this->nameVariable(&outColorName, '\0', "output");
     }
     fFS.codeAppendf("vec4 %s;", outColorName.c_str());
     *output = outColorName;
 
     // Enclose custom code in a block to avoid namespace conflicts
     SkString openBrace;
-    openBrace.printf("{ // Stage %d\n", fStageIndex);
+    openBrace.printf("{ // Stage %d, %s\n", fStageIndex, proc.name());
     fFS.codeAppend(openBrace.c_str());
 
     this->emitAndInstallProc(proc, keyProvider.get(index), output->c_str(),
                              input.isOnes() ? NULL : input.c_str());
 
     fFS.codeAppend("}");
 }
 
 void GrGLProgramBuilder::emitAndInstallProc(const GrFragmentStage& fs,
                                             const GrProcessorKey& key,
@@ skipping 212 matching lines @@
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 GrGLInstalledFragProcs::~GrGLInstalledFragProcs() {
     int numProcs = fProcs.count();
     for (int e = 0; e < numProcs; ++e) {
         SkDELETE(fProcs[e]);
     }
 }