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

samplecode/SampleApp.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SampleApp.h"
 
 #include "OverView.h"
@@ skipping 280 matching lines @@
             fCurContext->flush();
 
             if (!IsGpuDeviceType(dType)) {
                 // need to send the raster bits to the (gpu) window
                 fCurContext->setRenderTarget(fCurRenderTarget);
                 const SkBitmap& bm = win->getBitmap();
                 fCurRenderTarget->writePixels(0, 0, bm.width(), bm.height(),
                                              SkImageInfo2GrPixelConfig(bm.colorType(),
                                                                        bm.alphaType()),
                                              bm.getPixels(),
-                                             bm.rowBytes());
-
-                // extra flush call, until Brian can figure out what's going on.
-                fCurContext->flush();
+                                             bm.rowBytes(),
+                                             GrContext::kFlushWrites_PixelOp);
             }
         }
 #endif
 
         win->present();
     }
 
     virtual void windowSizeChanged(SampleWindow* win) {
 #if SK_SUPPORT_GPU
         if (fCurContext) {
@@ skipping 2103 matching lines @@
     setenv("ANDROID_ROOT", "/android/device/data", 0);
 #endif
     SkGraphics::Init();
     SkEvent::Init();
 }
 
 void application_term() {
     SkEvent::Term();
     SkGraphics::Term();
 }