cc: Remove BeginFrameSource::Create methods

cc/trees/single_thread_proxy.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/trees/single_thread_proxy.h"
 
 #include "base/auto_reset.h"
 #include "base/profiler/scoped_tracker.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/animation/animation_events.h"
@@ skipping 56 matching lines @@
 
     scoped_ptr<CompositorTimingHistory> compositor_timing_history(
         new CompositorTimingHistory(
             scheduler_settings.using_synchronous_renderer_compositor,
             CompositorTimingHistory::BROWSER_UMA,
             layer_tree_host_->rendering_stats_instrumentation()));
 
     BeginFrameSource* frame_source = external_begin_frame_source_.get();
     if (!scheduler_settings.throttle_frame_production) {
       // Unthrottled source takes precedence over external sources.
-      unthrottled_begin_frame_source_ = BackToBackBeginFrameSource::Create(
-          task_runner_provider_->MainThreadTaskRunner());
+      unthrottled_begin_frame_source_.reset(new BackToBackBeginFrameSource(
+          task_runner_provider_->MainThreadTaskRunner()));
       frame_source = unthrottled_begin_frame_source_.get();
     }
     if (!frame_source) {
-      synthetic_begin_frame_source_ = SyntheticBeginFrameSource::Create(
+      synthetic_begin_frame_source_.reset(new SyntheticBeginFrameSource(
           task_runner_provider_->MainThreadTaskRunner(),
-          BeginFrameArgs::DefaultInterval());
+          BeginFrameArgs::DefaultInterval()));
       frame_source = synthetic_begin_frame_source_.get();
     }
 
     scheduler_on_impl_thread_ =
         Scheduler::Create(this, scheduler_settings, layer_tree_host_->id(),
                           task_runner_provider_->MainThreadTaskRunner(),
                           frame_source, std::move(compositor_timing_history));
   }
 
   layer_tree_host_impl_ = layer_tree_host_->CreateLayerTreeHostImpl(this);
@@ skipping 802 matching lines @@
       << "DidFinishImplFrame called while not inside an impl frame!";
   inside_impl_frame_ = false;
 #endif
 }
 
 void SingleThreadProxy::SendBeginFramesToChildren(const BeginFrameArgs& args) {
   layer_tree_host_->SendBeginFramesToChildren(args);
 }
 
 }  // namespace cc