Make GrGLConfigConversionEffect work for Imagination and some other GPUs.

src/gpu/gl/GrGLShaderBuilder.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gl/GrGLShaderBuilder.h"
 #include "gl/GrGLProgram.h"
 #include "gl/GrGLUniformHandle.h"
@@ skipping 521 matching lines @@
             this->fsCodeAppendf("\tvec4 %s = %s;\n", inColorName.c_str(), inColor.c_str());
             inColor = inColorName;
         }
 
         // create var to hold stage result
         SkString outColorName;
         this->nameVariable(&outColorName, '\0', "output");
         this->fsCodeAppendf("\tvec4 %s;\n", outColorName.c_str());
         outColor = outColorName;
 
-
         programEffectsBuilder->emitEffect(stage,
                                           effectKeys[e],
                                           outColor.c_str(),
                                           inColor.isOnes() ? NULL : inColor.c_str(),
                                           fCodeStage.stageIndex());
 
         inColor = outColor;
         effectEmitted = true;
     }
 
@@ skipping 437 matching lines @@
 
     GrGLPathTexGenProgramEffectsBuilder pathTexGenEffectsBuilder(this,
                                                                  effectCnt);
     this->INHERITED::createAndEmitEffects(&pathTexGenEffectsBuilder,
                                           effectStages,
                                           effectKeys,
                                           effectCnt,
                                           inOutFSColor);
     return pathTexGenEffectsBuilder.finish();
 }