cc: Rename VSync to BeginFrame

cc/trees/layer_tree_host_unittest_scroll.cc

 // Copyright 2012 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/trees/layer_tree_host.h"
 
 #include "base/memory/weak_ptr.h"
 #include "cc/base/thread_impl.h"
 #include "cc/layers/content_layer.h"
 #include "cc/layers/layer.h"
@@ skipping 514 matching lines @@
   RunTest(true, true, true);
 }
 
 class ImplSidePaintingScrollTest : public LayerTreeHostScrollTest {
  public:
   virtual void InitializeSettings(LayerTreeSettings* settings) OVERRIDE {
     settings->impl_side_painting = true;
   }
 
   virtual void DrawLayersOnThread(LayerTreeHostImpl* impl) OVERRIDE {
-    // Manual vsync tick.
     if (impl->pending_tree())
       impl->SetNeedsRedraw();
   }
 };
 
 class ImplSidePaintingScrollTestSimple : public ImplSidePaintingScrollTest {
  public:
   ImplSidePaintingScrollTestSimple()
       : initial_scroll_(10, 20),
         main_thread_scroll_(40, 5),
@@ skipping 202 matching lines @@
                             base::Unretained(&input_handler_client)));
 
   layer_tree_host->DidStopFlinging();
   layer_tree_host.reset();
   impl_thread.Stop();
   EXPECT_TRUE(received_stop_flinging);
 }
 
 }  // namespace
 }  // namespace cc