Replace scoped_ptr with std::unique_ptr in //ui

ui/views/controls/menu/menu_host.h

Index: ui/views/controls/menu/menu_host.h
diff --git a/ui/views/controls/menu/menu_host.h b/ui/views/controls/menu/menu_host.h
index ba931f8ed201dda2422230a39a280bbef8d4175c..1de123735630850dec1ab510a01c5499767b6d85 100644
--- a/ui/views/controls/menu/menu_host.h
+++ b/ui/views/controls/menu/menu_host.h
@@ -5,9 +5,10 @@
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_HOST_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_HOST_H_
 
+#include <memory>
+
 #include "base/compiler_specific.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/views/widget/widget.h"
 
@@ -83,7 +84,7 @@ class MenuHost : public Widget {
 
 #if !defined(OS_MACOSX)
   // Handles raw touch events at the moment.
-  scoped_ptr<internal::PreMenuEventDispatchHandler> pre_dispatch_handler_;
+  std::unique_ptr<internal::PreMenuEventDispatchHandler> pre_dispatch_handler_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(MenuHost);