Refactor how we store and use samplers in Ganesh

src/effects/SkBlurMaskFilter.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBlurMaskFilter.h"
 #include "SkBlurMask.h"
 #include "SkGpuBlurUtils.h"
@@ skipping 673 matching lines @@
 private:
     typedef GrGLSLProgramDataManager::UniformHandle UniformHandle;
 
     UniformHandle       fProxyRectUniform;
     UniformHandle       fProfileSizeUniform;
 
     typedef GrGLSLFragmentProcessor INHERITED;
 };
 
 void OutputRectBlurProfileLookup(GrGLSLFPFragmentBuilder* fragBuilder,
-                                 const GrGLSLSampler& sampler,
+                                 GrGLSLFragmentProcessor::SamplerHandle sampler,
                                  const char *output,
                                  const char *profileSize, const char *loc,
                                  const char *blurred_width,
                                  const char *sharp_width) {
     fragBuilder->codeAppendf("float %s;", output);
     fragBuilder->codeAppendf("{");
     fragBuilder->codeAppendf("float coord = ((abs(%s - 0.5 * %s) - 0.5 * %s)) / %s;",
                            loc, blurred_width, sharp_width, profileSize);
     fragBuilder->codeAppendf("%s = ", output);
     fragBuilder->appendTextureLookup(sampler, "vec2(coord,0.5)");
@@ skipping 610 matching lines @@
     } else {
         str->append("None");
     }
     str->append("))");
 }
 #endif
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkBlurMaskFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkBlurMaskFilterImpl)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END