Auto-compare GrProcessors' texture accesses in isEqual().

src/effects/SkArithmeticMode.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkArithmeticMode.h"
 #include "SkColorPriv.h"
 #include "SkReadBuffer.h"
@@ skipping 318 matching lines @@
 
 GrArithmeticEffect::~GrArithmeticEffect() {
 }
 
 bool GrArithmeticEffect::onIsEqual(const GrFragmentProcessor& sBase) const {
     const GrArithmeticEffect& s = sBase.cast<GrArithmeticEffect>();
     return fK1 == s.fK1 &&
            fK2 == s.fK2 &&
            fK3 == s.fK3 &&
            fK4 == s.fK4 &&
-           fEnforcePMColor == s.fEnforcePMColor &&
-           backgroundTexture() == s.backgroundTexture();
+           fEnforcePMColor == s.fEnforcePMColor;
 }
 
 const GrBackendFragmentProcessorFactory& GrArithmeticEffect::getFactory() const {
     return GrTBackendFragmentProcessorFactory<GrArithmeticEffect>::getInstance();
 }
 
 void GrArithmeticEffect::onComputeInvariantOutput(InvariantOutput* inout) const {
     // TODO: optimize this
     inout->setToUnknown();
 }
@@ skipping 101 matching lines @@
                                          background);
     }
     return true;
 }
 
 #endif
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkArithmeticMode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkArithmeticMode_scalar)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END