Make GrFragmentProcessor auto-compare coord xforms.

src/gpu/effects/GrSingleTextureEffect.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrSingleTextureEffect_DEFINED
 #define GrSingleTextureEffect_DEFINED
 
@@ skipping 20 matching lines @@
     GrSingleTextureEffect(GrTexture*,
                           const SkMatrix&,
                           const GrTextureParams&,
                           GrCoordSet = kLocal_GrCoordSet);
 
     /**
      * Helper for subclass onIsEqual() functions.
      */
     bool hasSameTextureParamsMatrixAndSourceCoords(const GrSingleTextureEffect& other) const {
         // We don't have to check the accesses' swizzles because they are inferred from the texture.
-        return fTextureAccess == other.fTextureAccess &&
-               fCoordTransform.getMatrix().cheapEqualTo(other.fCoordTransform.getMatrix()) &&
-               fCoordTransform.sourceCoords() == other.fCoordTransform.sourceCoords();
+        return fTextureAccess == other.fTextureAccess;
     }
 
     /**
      * Can be used as a helper to implement subclass onComputeInvariantOutput(). It assumes that
      * the subclass output color will be a modulation of the input color with a value read from the
      * texture.
      */
     void updateInvariantOutputForModulation(InvariantOutput* inout) const {
         if (GrPixelConfigIsOpaque(this->texture(0)->config())) {
             inout->mulByUnknownOpaqueColor();
         } else {
             inout->mulByUnknownColor();
         }
     }
 
 private:
     GrCoordTransform fCoordTransform;
     GrTextureAccess  fTextureAccess;
 
     typedef GrFragmentProcessor INHERITED;
 };
 
 #endif