Remove DrawingMgr shims from GrContext

src/gpu/SkGr.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTextureMaker.h"
 
 #include "SkGr.h"
@@ skipping 259 matching lines @@
     // copies of texels from the original.
     GrTextureParams params(SkShader::kClamp_TileMode,
                            SkGrStretch::kBilerp_Type == stretch.fType ?
                               GrTextureParams::kBilerp_FilterMode :
                               GrTextureParams::kNone_FilterMode);
     paint.addColorTextureProcessor(inputTexture, SkMatrix::I(), params);
 
     SkRect rect = SkRect::MakeWH(SkIntToScalar(rtDesc.fWidth), SkIntToScalar(rtDesc.fHeight));
     SkRect localRect = SkRect::MakeWH(1.f, 1.f);
 
-    SkAutoTUnref<GrDrawContext> drawContext(context->drawContext(stretched->asRenderTarget()));
+    SkAutoTUnref<GrDrawContext> drawContext(
+                                context->drawingMgr().drawContext(stretched->asRenderTarget()));
     if (!drawContext) {
         return nullptr;
     }
 
     drawContext->drawNonAARectToRect(GrClip::WideOpen(), paint, SkMatrix::I(), rect, localRect);
 
     return stretched.detach();
 }
 
 GrPixelConfig GrIsCompressedTextureDataSupported(GrContext* ctx, SkData* data,
@@ skipping 594 matching lines @@
         SkBitmap stretchedBmp = stretch_on_cpu(bitmap, stretch);
         return create_unstretched_bitmap_texture(ctx, stretchedBmp, GrUniqueKey());
     } else {
         SkAutoTUnref<GrTexture> unstretched(this->onRefUnstretchedTexture(ctx));
         if (!unstretched) {
             return nullptr;
         }
         return stretch_texture(unstretched, stretch, nullptr, GrUniqueKey());
     }
 }