GrContext::copyTexture->GrContext::copySurface. Add a flush writes pixel ops flag.

src/image/SkSurface_Gpu.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkSurface_Base.h"
 #include "SkImagePriv.h"
 #include "SkCanvas.h"
@@ skipping 71 matching lines @@
     // are we sharing our render target with the image?
     SkASSERT(this->getCachedImage());
     if (rt->asTexture() == SkTextureImageGetTexture(this->getCachedImage())) {
         // We call createCompatibleDevice because it uses the texture cache. This isn't
         // necessarily correct (http://skbug.com/2252), but never using the cache causes
         // a Chromium regression. (http://crbug.com/344020)
         SkGpuDevice* newDevice = static_cast<SkGpuDevice*>(
             fDevice->createCompatibleDevice(fDevice->imageInfo()));
         SkAutoTUnref<SkGpuDevice> aurd(newDevice);
         if (kRetain_ContentChangeMode == mode) {
-            fDevice->context()->copyTexture(rt->asTexture(), newDevice->accessRenderTarget());
+            fDevice->context()->copySurface(newDevice->accessRenderTarget(), rt->asTexture());
         }
         SkASSERT(this->getCachedCanvas());
         SkASSERT(this->getCachedCanvas()->getDevice() == fDevice);
 
         this->getCachedCanvas()->setRootDevice(newDevice);
         SkRefCnt_SafeAssign(fDevice, newDevice);
     } else if (kDiscard_ContentChangeMode == mode) {
         this->SkSurface_Gpu::onDiscard();
     }
 }
@@ skipping 46 matching lines @@
     desc.fSampleCnt = sampleCount;
 
     SkAutoTUnref<GrTexture> tex(ctx->lockAndRefScratchTexture(desc, GrContext::kExact_ScratchTexMatch));
 
     if (NULL == tex) {
         return NULL;
     }
 
     return SkNEW_ARGS(SkSurface_Gpu, (tex->asRenderTarget(), true, props, true));
 }