Attempt to somewhat simplify GrContext::readSurfacePixels interaction with GrGpu.

src/gpu/GrTest.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 "GrTest.h"
 #include "GrContextOptions.h"
@@ skipping 132 matching lines @@
 class MockGpu : public GrGpu {
 public:
     MockGpu(GrContext* context, const GrContextOptions& options) : INHERITED(context) {
         fCaps.reset(SkNEW_ARGS(GrCaps, (options)));
     }
     ~MockGpu() override {}
     bool canWriteTexturePixels(const GrTexture*, GrPixelConfig srcConfig) const override {
         return true;
     }
 
-    bool readPixelsWillPayForYFlip(GrRenderTarget* renderTarget,
-                                   int left, int top,
-                                   int width, int height,
-                                   GrPixelConfig config,
-                                   size_t rowBytes) const override { return false; }
+    bool getReadPixelsInfo(GrSurface* srcSurface, int readWidth, int readHeight, size_t rowBytes,
+                           GrPixelConfig readConfig, DrawPreference*,
+                           ReadPixelTempDrawInfo*) override { return false; }
+
     void buildProgramDesc(GrProgramDesc*,const GrPrimitiveProcessor&,
                           const GrPipeline&,
                           const GrBatchTracker&) const override {}
 
     void discard(GrRenderTarget*) override {}
 
     bool copySurface(GrSurface* dst,
                      GrSurface* src,
                      const SkIRect& srcRect,
                      const SkIPoint& dstPoint) override { return false; };
@@ skipping 90 matching lines @@
     SkASSERT(NULL == fGpu);
     fGpu = SkNEW_ARGS(MockGpu, (this, options));
     SkASSERT(fGpu);
     this->initCommon();
 
     // We delete these because we want to test the cache starting with zero resources. Also, none of
     // these objects are required for any of tests that use this context. TODO: make stop allocating
     // resources in the buffer pools.
     fDrawingMgr.abandon();
 }