Add some copy support for vulkan msaa

tools/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 "GrBatchAtlas.h"
@@ skipping 288 matching lines @@
     bool onCopySurface(GrSurface* dst,
                        GrSurface* src,
                        const SkIRect& srcRect,
                        const SkIPoint& dstPoint) override { return false; };
 
     void onGetMultisampleSpecs(GrRenderTarget* rt, const GrStencilSettings&,
                                int* effectiveSampleCnt, SamplePattern*) override {
         *effectiveSampleCnt = rt->desc().fSampleCnt;
     }
 
-    bool initCopySurfaceDstDesc(const GrSurface* src, GrSurfaceDesc* desc) const override {
+    bool initDescForDstCopy(const GrRenderTarget* src, GrSurfaceDesc* desc) const override {
         return false;
     }
 
     GrGpuCommandBuffer* createCommandBuffer(GrRenderTarget* target,
                                             const GrGpuCommandBuffer::LoadAndStoreInfo&,
                                             const GrGpuCommandBuffer::LoadAndStoreInfo&) override {
         return nullptr;
     }
 
     void drawDebugWireRect(GrRenderTarget*, const SkIRect&, GrColor) override {};
@@ skipping 85 matching lines @@
     SkASSERT(nullptr == fGpu);
     fGpu = new MockGpu(this, options);
     SkASSERT(fGpu);
     this->initCommon(options);
 
     // 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.
     fDrawingManager->abandon();
 }