cc: Make BackToBackBeginFrameSource a SyntheticBeginFrameSource.

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 "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 681 matching lines @@
   SetVisibleOnLayerTreeHost(true);
 }
 
 void LayerTreeTest::DoBeginTest() {
   client_ = LayerTreeHostClientForTesting::Create(this);
 
   std::unique_ptr<FakeExternalBeginFrameSource> external_begin_frame_source;
   if (settings_.use_external_begin_frame_source) {
     DCHECK(!IsRemoteTest());
     external_begin_frame_source.reset(new FakeExternalBeginFrameSource(
-        settings_.renderer_settings.refresh_rate));
+        settings_.renderer_settings.refresh_rate, true));
     external_begin_frame_source_ = external_begin_frame_source.get();
   }
 
   DCHECK(!impl_thread_ || impl_thread_->task_runner().get());
 
   if (IsRemoteTest()) {
     DCHECK(impl_thread_);
     layer_tree_host_ = LayerTreeHostForTesting::Create(
         this, mode_, client_.get(), &remote_proto_channel_bridge_.channel_main,
         nullptr, nullptr, task_graph_runner_.get(), settings_,
@@ skipping 324 matching lines @@
 
 RemoteChannelImplForTest* LayerTreeTest::GetRemoteChannelImplForTest() const {
   DCHECK(IsRemoteTest());
   DCHECK(remote_client_layer_tree_host_);
 
   return static_cast<RemoteChannelImplForTest*>(
       remote_client_layer_tree_host_->proxy());
 }
 
 }  // namespace cc