Add Gr*Proxy classes

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 "SkBitmap.h"
@@ skipping 317 matching lines @@
                                             scale,
                                             displTexture.get(),
                                             offsetMatrix,
                                             colorTexture.get(),
                                             SkISize::Make(color->width(),
                                                           color->height())))->unref();
         paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
         SkMatrix matrix;
         matrix.setTranslate(-SkIntToScalar(colorBounds.x()), -SkIntToScalar(colorBounds.y()));
 
-        sk_sp<GrDrawContext> drawContext(context->newDrawContext(GrContext::kLoose_BackingFit,
+        sk_sp<GrDrawContext> drawContext(context->newDrawContext(SkBackingFit::kApprox,
                                                                  bounds.width(), bounds.height(),
                                                                  kSkia8888_GrPixelConfig));
         if (!drawContext) {
             return nullptr;
         }
 
         drawContext->drawRect(GrClip::WideOpen(), paint, matrix, SkRect::Make(colorBounds));
 
         offset->fX = bounds.left();
         offset->fY = bounds.top();
@@ skipping 268 matching lines @@
 void GrGLDisplacementMapEffect::GenKey(const GrProcessor& proc,
                                        const GrGLSLCaps&, GrProcessorKeyBuilder* b) {
     const GrDisplacementMapEffect& displacementMap = proc.cast<GrDisplacementMapEffect>();
 
     uint32_t xKey = displacementMap.xChannelSelector();
     uint32_t yKey = displacementMap.yChannelSelector() << kChannelSelectorKeyBits;
 
     b->add32(xKey | yKey);
 }
 #endif