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

cc/trees/channel_impl.h

Index: cc/trees/channel_impl.h
diff --git a/cc/trees/channel_impl.h b/cc/trees/channel_impl.h
index d5d3159cc442f641c975196a4e68b1399e4d4b40..f2c29338eaf26d06fa49fb176a33a042081b6b01 100644
--- a/cc/trees/channel_impl.h
+++ b/cc/trees/channel_impl.h
@@ -26,7 +26,7 @@ class CC_EXPORT ChannelImpl {
       const RendererCapabilities& capabilities) = 0;
   virtual void BeginMainFrameNotExpectedSoon() = 0;
   virtual void DidCommitAndDrawFrame() = 0;
-  virtual void SetAnimationEvents(scoped_ptr<AnimationEvents> queue) = 0;
+  virtual void SetAnimationEvents(std::unique_ptr<AnimationEvents> queue) = 0;
   virtual void DidLoseOutputSurface() = 0;
   virtual void RequestNewOutputSurface() = 0;
   virtual void DidInitializeOutputSurface(
@@ -34,10 +34,11 @@ class CC_EXPORT ChannelImpl {
       const RendererCapabilities& capabilities) = 0;
   virtual void DidCompletePageScaleAnimation() = 0;
   virtual void PostFrameTimingEventsOnMain(
-      scoped_ptr<FrameTimingTracker::CompositeTimingSet> composite_events,
-      scoped_ptr<FrameTimingTracker::MainFrameTimingSet> main_frame_events) = 0;
+      std::unique_ptr<FrameTimingTracker::CompositeTimingSet> composite_events,
+      std::unique_ptr<FrameTimingTracker::MainFrameTimingSet>
+          main_frame_events) = 0;
   virtual void BeginMainFrame(
-      scoped_ptr<BeginMainFrameAndCommitState> begin_main_frame_state) = 0;
+      std::unique_ptr<BeginMainFrameAndCommitState> begin_main_frame_state) = 0;
 
  protected:
   virtual ~ChannelImpl() {}