Move MakeDivByTextureWHMatrix to GrCoordTransform

src/effects/SkDisplacementMapEffect.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 "SkDisplacementMapEffect.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
@@ skipping 409 matching lines @@
         return false;
     }
     SkAutoTUnref<GrTexture> dst(ast.detach());
 
     GrContext::AutoRenderTarget art(context, dst->asRenderTarget());
 
     SkVector scale = SkVector::Make(fScale, fScale);
     ctx.ctm().mapVectors(&scale, 1);
 
     GrPaint paint;
-    SkMatrix offsetMatrix = GrEffect::MakeDivByTextureWHMatrix(displacement);
+    SkMatrix offsetMatrix = GrCoordTransform::MakeDivByTextureWHMatrix(displacement);
     offsetMatrix.preTranslate(SkIntToScalar(colorOffset.fX - displacementOffset.fX),
                               SkIntToScalar(colorOffset.fY - displacementOffset.fY));
 
     paint.addColorEffect(
         GrDisplacementMapEffect::Create(fXChannelSelector,
                                         fYChannelSelector,
                                         scale,
                                         displacement,
                                         offsetMatrix,
                                         color))->unref();
@@ skipping 194 matching lines @@
                                        const GrGLCaps&, GrEffectKeyBuilder* b) {
     const GrDisplacementMapEffect& displacementMap =
         drawEffect.castEffect<GrDisplacementMapEffect>();
 
     uint32_t xKey = displacementMap.xChannelSelector();
     uint32_t yKey = displacementMap.yChannelSelector() << kChannelSelectorKeyBits;
 
     b->add32(xKey | yKey);
 }
 #endif