Add Arithmetic mode xp.

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 "GrCoordTransform.h"
@@ skipping 34 matching lines @@
     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 = 37;
 static const int kGPFactoryCount = 14;
-static const int kXPFactoryCount = 3;
+static const int kXPFactoryCount = 4;
 
 template<>
 void GrProcessorTestFactory<GrFragmentProcessor>::VerifyFactoryCount() {
     if (kFPFactoryCount != GetFactories()->count()) {
         SkFAIL("Wrong number of fragment processor factories!");
     }
 }
 
 template<>
 void GrProcessorTestFactory<GrGeometryProcessor>::VerifyFactoryCount() {
@@ skipping 115 matching lines @@
 
 void GrGeometryData::operator delete(void* target) {
     GrProcessor_Globals::GetTLS()->release(target);
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 // Initial static variable from GrXPFactory
 int32_t GrXPFactory::gCurrXPFClassID =
         GrXPFactory::kIllegalXPFClassID;