Add Gr*Proxy classes

src/effects/SkLightingImageFilter.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 "SkLightingImageFilter.h"
 #include "SkBitmap.h"
 #include "SkColorPriv.h"
@@ skipping 389 matching lines @@
                                                                     SkSpecialImage* input,
                                                                     const SkIRect& offsetBounds,
                                                                     const SkMatrix& matrix) const {
     SkASSERT(source->isTextureBacked());
 
     GrContext* context = source->getContext();
 
     sk_sp<GrTexture> inputTexture(input->asTextureRef(context));
     SkASSERT(inputTexture);
 
-    sk_sp<GrDrawContext> drawContext(context->newDrawContext(GrContext::kLoose_BackingFit,
+    sk_sp<GrDrawContext> drawContext(context->newDrawContext(SkBackingFit::kApprox,
                                                              offsetBounds.width(),
                                                              offsetBounds.height(),
                                                              kRGBA_8888_GrPixelConfig));
     if (!drawContext) {
         return nullptr;
     }
 
     SkRect dstRect = SkRect::MakeWH(SkIntToScalar(offsetBounds.width()),
                                     SkIntToScalar(offsetBounds.height()));
 
@@ skipping 1742 matching lines @@
 
     fragBuilder->codeAppendf("%s(%s)", fLightColorFunc.c_str(), surfaceToLight);
 }
 
 #endif
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkLightingImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDiffuseLightingImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkSpecularLightingImageFilter)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END