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

src/effects/SkMagnifierImageFilter.cpp

 /*
  * Copyright 2012 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 "SkBitmap.h"
 #include "SkMagnifierImageFilter.h"
 #include "SkColorPriv.h"
@@ skipping 200 matching lines @@
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 const GrBackendFragmentProcessorFactory& GrMagnifierEffect::getFactory() const {
     return GrTBackendFragmentProcessorFactory<GrMagnifierEffect>::getInstance();
 }
 
 bool GrMagnifierEffect::onIsEqual(const GrFragmentProcessor& sBase) const {
     const GrMagnifierEffect& s = sBase.cast<GrMagnifierEffect>();
-    return (this->texture(0) == s.texture(0) &&
-            this->fXOffset == s.fXOffset &&
+    return (this->fXOffset == s.fXOffset &&
             this->fYOffset == s.fYOffset &&
             this->fXInvZoom == s.fXInvZoom &&
             this->fYInvZoom == s.fYInvZoom &&
             this->fXInvInset == s.fXInvInset &&
             this->fYInvInset == s.fYInvInset);
 }
 
 void GrMagnifierEffect::onComputeInvariantOutput(InvariantOutput* inout) const {
     this->updateInvariantOutputForModulation(inout);
 }
@@ skipping 132 matching lines @@
 
             int x_val = SkPin32(SkScalarFloorToInt(x_interp), 0, width - 1);
             int y_val = SkPin32(SkScalarFloorToInt(y_interp), 0, height - 1);
 
             *dptr = sptr[y_val * width + x_val];
             dptr++;
         }
     }
     return true;
 }