cc: Rename VSync to BeginFrame

cc/test/layer_tree_test.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/test/layer_tree_test.h"
 
 #include "base/command_line.h"
 #include "cc/animation/animation.h"
 #include "cc/animation/animation_registrar.h"
 #include "cc/animation/layer_animation_controller.h"
@@ skipping 530 matching lines @@
                             bool impl_side_painting) {
   if (threaded) {
     impl_thread_.reset(new base::Thread("Compositor"));
     ASSERT_TRUE(impl_thread_->Start());
   }
 
   main_ccthread_ = cc::ThreadImpl::CreateForCurrentThread();
 
   delegating_renderer_ = delegating_renderer;
 
-  // Spend less time waiting for vsync because the output is mocked out.
+  // Spend less time waiting for BeginFrame because the output is mocked out.
   settings_.refresh_rate = 200.0;
   if (impl_side_painting) {
     DCHECK(threaded) <<
         "Don't run single thread + impl side painting, it doesn't exist.";
     settings_.impl_side_painting = true;
   }
   InitializeSettings(&settings_);
 
   main_ccthread_->PostTask(
       base::Bind(&LayerTreeTest::DoBeginTest, base::Unretained(this)));
@@ skipping 40 matching lines @@
 
 scoped_refptr<cc::ContextProvider> LayerTreeTest::
     OffscreenContextProviderForCompositorThread() {
   if (!compositor_thread_contexts_ ||
       compositor_thread_contexts_->DestroyedOnMainThread())
     compositor_thread_contexts_ = FakeContextProvider::Create();
   return compositor_thread_contexts_;
 }
 
 }  // namespace cc