Flush GrContext between benchmark draw loops

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 2239 matching lines @@
 void SampleView::onDraw(SkCanvas* canvas) {
     if (!fHaveCalledOnceBeforeDraw) {
         fHaveCalledOnceBeforeDraw = true;
         this->onOnceBeforeDraw();
     }
     this->onDrawBackground(canvas);
 
     for (int i = 0; i < fRepeatCount; i++) {
         SkAutoCanvasRestore acr(canvas, true);
         this->onDrawContent(canvas);
+#if SK_SUPPORT_GPU
+        // Ensure the GrContext doesn't batch across draw loops.
+        if (GrContext* context = canvas->getGrContext()) {
+            context->flush();
+        }
+#endif
     }
 }
 
 void SampleView::onDrawBackground(SkCanvas* canvas) {
     canvas->drawColor(fBGColor);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 template <typename T> void SkTBSort(T array[], int count) {
@@ skipping 127 matching lines @@
 #ifdef SK_BUILD_FOR_MAC
     setenv("ANDROID_ROOT", "/android/device/data", 0);
 #endif
     SkGraphics::Init();
     SkEvent::Init();
 }
 
 void application_term() {
     SkEvent::Term();
 }