Convert //ash from scoped_ptr to std::unique_ptr

ash/frame/custom_frame_view_ash.h

Index: ash/frame/custom_frame_view_ash.h
diff --git a/ash/frame/custom_frame_view_ash.h b/ash/frame/custom_frame_view_ash.h
index 892086f8f65d09a4a9727bd06c4d06ec79c7d087..b139f261b7b77b3effc1f45c6c90572d5366ee20 100644
--- a/ash/frame/custom_frame_view_ash.h
+++ b/ash/frame/custom_frame_view_ash.h
@@ -5,9 +5,10 @@
 #ifndef ASH_FRAME_CUSTOM_FRAME_VIEW_ASH_H_
 #define ASH_FRAME_CUSTOM_FRAME_VIEW_ASH_H_
 
+#include <memory>
+
 #include "ash/ash_export.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/views/window/non_client_view.h"
 
@@ -94,7 +95,8 @@ class ASH_EXPORT CustomFrameViewAsh : public views::NonClientFrameView {
   HeaderView* header_view_;
 
   // Updates the hittest bounds overrides based on the window state type.
-  scoped_ptr<FrameBorderHitTestController> frame_border_hit_test_controller_;
+  std::unique_ptr<FrameBorderHitTestController>
+      frame_border_hit_test_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(CustomFrameViewAsh);
 };