Make GrFragmentProcessor auto-compare coord xforms.

src/effects/gradients/SkGradientShader.cpp

 /*
  * Copyright 2006 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 "SkGradientShaderPriv.h"
 #include "SkLinearGradient.h"
 #include "SkRadialGradient.h"
@@ skipping 1187 matching lines @@
             }
         } else {
             if (fYCoord != s.getYCoord()) {
                 return false;
             }
         }
 
         return fTextureAccess.getTexture() == s.fTextureAccess.getTexture()  &&
             fTextureAccess.getParams().getTileModeX() ==
                 s.fTextureAccess.getParams().getTileModeX() &&
-            this->useAtlas() == s.useAtlas() &&
-            fCoordTransform.getMatrix().cheapEqualTo(s.fCoordTransform.getMatrix());
+            this->useAtlas() == s.useAtlas();
     }
 
     return false;
 }
 
 void GrGradientEffect::onComputeInvariantOutput(InvariantOutput* inout) const {
     if (fIsOpaque) {
         inout->mulByUnknownOpaqueColor();
     } else {
         inout->mulByUnknownColor();
@@ skipping 18 matching lines @@
             (*stops)[i] = stop;
             stop = i < outColors - 1 ? stop + random->nextUScalar1() * (1.f - stop) : 1.f;
         }
     }
     *tm = static_cast<SkShader::TileMode>(random->nextULessThan(SkShader::kTileModeCount));
 
     return outColors;
 }
 
 #endif