Convert //ash from scoped_ptr to std::unique_ptr

ash/display/display_configuration_controller.h

Index: ash/display/display_configuration_controller.h
diff --git a/ash/display/display_configuration_controller.h b/ash/display/display_configuration_controller.h
index 2256b6db5469d93533e153967c02aea9b67c4b0a..c91d9d87c84e245cef3e13fc9db397df3fb3f2a3 100644
--- a/ash/display/display_configuration_controller.h
+++ b/ash/display/display_configuration_controller.h
@@ -41,7 +41,7 @@ class ASH_EXPORT DisplayConfigurationController
   // Sets the layout for the current displays with a fade in/out
   // animation. Currently |display_id| is assumed to be the secondary
   // display.  TODO(oshima/stevenjb): Support 3+ displays.
-  void SetDisplayLayout(scoped_ptr<display::DisplayLayout> layout,
+  void SetDisplayLayout(std::unique_ptr<display::DisplayLayout> layout,
                         bool user_action);
 
   // Sets the mirror mode with a fade-in/fade-out animation. Affects all
@@ -73,14 +73,14 @@ class ASH_EXPORT DisplayConfigurationController
   // *before* starting any animations.
   void SetThrottleTimeout(int64_t throttle_ms);
   bool IsLimited();
-  void SetDisplayLayoutImpl(scoped_ptr<display::DisplayLayout> layout);
+  void SetDisplayLayoutImpl(std::unique_ptr<display::DisplayLayout> layout);
   void SetMirrorModeImpl(bool mirror);
   void SetPrimaryDisplayIdImpl(int64_t display_id);
 
   DisplayManager* display_manager_;                  // weak ptr
   WindowTreeHostManager* window_tree_host_manager_;  // weak ptr
-  scoped_ptr<DisplayAnimator> display_animator_;
-  scoped_ptr<DisplayChangeLimiter> limiter_;
+  std::unique_ptr<DisplayAnimator> display_animator_;
+  std::unique_ptr<DisplayChangeLimiter> limiter_;
 
   base::WeakPtrFactory<DisplayConfigurationController> weak_ptr_factory_;