cc: Cleanup DelayBasedTimeSource code.

cc/scheduler/begin_frame_source.h

 // Copyright 2014 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.
 
 #ifndef CC_SCHEDULER_BEGIN_FRAME_SOURCE_H_
 #define CC_SCHEDULER_BEGIN_FRAME_SOURCE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 189 matching lines @@
 
  private:
   base::WeakPtrFactory<BackToBackBeginFrameSource> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BackToBackBeginFrameSource);
 };
 
 // A frame source which is locked to an external parameters provides from a
 // vsync source and generates BeginFrameArgs for it.
 class CC_EXPORT SyntheticBeginFrameSource : public BeginFrameSourceBase,
-                                            public TimeSourceClient {
+                                            public DelayBasedTimeSourceClient {
  public:
   static scoped_ptr<SyntheticBeginFrameSource> Create(
       base::SingleThreadTaskRunner* task_runner,
       base::TimeDelta initial_vsync_interval);
   ~SyntheticBeginFrameSource() override;
 
   void OnUpdateVSyncParameters(base::TimeTicks new_vsync_timebase,
                                base::TimeDelta new_vsync_interval);
 
   // Tracing
   void AsValueInto(base::trace_event::TracedValue* dict) const override;
 
-  // TimeSourceClient
+  // DelayBasedTimeSourceClient
   void OnTimerTick() override;
 
  protected:
   explicit SyntheticBeginFrameSource(
       scoped_ptr<DelayBasedTimeSource> time_source);
 
   BeginFrameArgs CreateBeginFrameArgs(base::TimeTicks frame_time,
                                       BeginFrameArgs::BeginFrameArgsType type);
 
   // BeginFrameSourceBase
@@ skipping 49 matching lines @@
   BeginFrameSource* active_source_;
   std::set<BeginFrameSource*> source_list_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BeginFrameSourceMultiplexer);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_BEGIN_FRAME_SOURCE_H_