Convert //cc from scoped_ptr to std::unique_ptr.

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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 197 matching lines @@
 };
 
 // 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 DelayBasedTimeSourceClient {
  public:
   explicit SyntheticBeginFrameSource(base::SingleThreadTaskRunner* task_runner,
                                      base::TimeDelta initial_vsync_interval);
   explicit SyntheticBeginFrameSource(
-      scoped_ptr<DelayBasedTimeSource> time_source);
+      std::unique_ptr<DelayBasedTimeSource> time_source);
   ~SyntheticBeginFrameSource() override;
 
   void OnUpdateVSyncParameters(base::TimeTicks new_vsync_timebase,
                                base::TimeDelta new_vsync_interval);
 
   // BeginFrameSourceBase
   void AddObserver(BeginFrameObserver* obs) override;
   void OnNeedsBeginFramesChanged(bool needs_begin_frames) override;
 
   // Tracing
   void AsValueInto(base::trace_event::TracedValue* dict) const override;
 
   // DelayBasedTimeSourceClient
   void OnTimerTick() override;
 
  protected:
   BeginFrameArgs CreateBeginFrameArgs(base::TimeTicks frame_time,
                                       BeginFrameArgs::BeginFrameArgsType type);
 
-  scoped_ptr<DelayBasedTimeSource> time_source_;
+  std::unique_ptr<DelayBasedTimeSource> time_source_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SyntheticBeginFrameSource);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_BEGIN_FRAME_SOURCE_H_