Add gpu implementation of SkAvoidXfermode

src/gpu/GrProcessor.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 "GrProcessor.h"
 #include "GrContext.h"
 #include "GrGeometryProcessor.h"
@@ skipping 30 matching lines @@
 GrProcessorTestFactory<GrGeometryProcessor>::GetFactories() {
     static SkTArray<GrProcessorTestFactory<GrGeometryProcessor>*, true> gFactories;
     return &gFactories;
 }
 
 /*
  * To ensure we always have successful static initialization, before creating from the factories
  * we verify the count is as expected.  If a new factory is added, then these numbers must be
  * manually adjusted.
  */
-static const int kFPFactoryCount = 40;
+static const int kFPFactoryCount = 41;
 static const int kGPFactoryCount = 14;
-static const int kXPFactoryCount = 7;
+static const int kXPFactoryCount = 8;
 
 template<>
 void GrProcessorTestFactory<GrFragmentProcessor>::VerifyFactoryCount() {
     if (kFPFactoryCount != GetFactories()->count()) {
         SkFAIL("Wrong number of fragment processor factories!");
     }
 }
 
 template<>
 void GrProcessorTestFactory<GrGeometryProcessor>::VerifyFactoryCount() {
@@ skipping 60 matching lines @@
         }
     }
     return true;
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 // Initial static variable from GrXPFactory
 int32_t GrXPFactory::gCurrXPFClassID =
         GrXPFactory::kIllegalXPFClassID;