fix for GrFragmentProcessor isEqual in GrPipeline

include/gpu/GrStagedProcessor.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrStagedProcessorStage_DEFINED
 #define GrStagedProcessorStage_DEFINED
 
 #include "GrFragmentProcessor.h"
 #include "SkRefCnt.h"
 
 /**
  * Wraps a GrFragmentProcessor, basically a copyable SkAutoTUnref
  * Templatized based on the ref type so backends can use the same wrapper
  */
 template<template<typename> class T>
 class GrStagedProcessor {
 public:
     explicit GrStagedProcessor(const GrFragmentProcessor* proc) : fProc(SkRef(proc)) {}
 
     GrStagedProcessor(const GrStagedProcessor& other) { fProc.reset(SkRef(other.fProc.get())); }
 
     const GrFragmentProcessor* processor() const { return fProc.get(); }
 
     bool operator==(const GrStagedProcessor& that) const {
-        return this->processor() == that.processor();
+        return this->processor()->isEqual(*that.processor());
     }
 
     bool operator!=(const GrStagedProcessor& that) const { return !(*this == that); }
 
     const char* name() const { return fProc->name(); }
 
 protected:
     GrStagedProcessor() {}
 
     T<const GrFragmentProcessor> fProc;
 };
 
 typedef GrStagedProcessor<SkAutoTUnref> GrFragmentStage;
 
 #endif