Refactor how we store and use samplers in Ganesh

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 "GrAutoLocaleSetter.h"
@@ skipping 215 matching lines @@
       GL_CALL(DeleteShader(shaderIDs[i]));
     }
 }
 
 GrGLProgram* GrGLProgramBuilder::createProgram(GrGLuint programID) {
     return new GrGLProgram(fGpu,
                            this->desc(),
                            fUniformHandles,
                            programID,
                            fUniformHandler.fUniforms,
+                           fUniformHandler.fSamplers,
                            fVaryingHandler.fPathProcVaryingInfos,
                            fGeometryProcessor,
                            fXferProcessor,
-                           fFragmentProcessors,
-                           &fSamplerUniforms);
+                           fFragmentProcessors);
 }