Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/cocoa/toolbar/back_forward_menu_controller.mm

 // Copyright (c) 2012 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.
 
 #import "chrome/browser/ui/cocoa/toolbar/back_forward_menu_controller.h"
 
+#include <memory>
+
 #include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/strings/sys_string_conversions.h"
 #import "chrome/browser/ui/cocoa/menu_button.h"
 #include "chrome/browser/ui/toolbar/back_forward_menu_model.h"
 #import "ui/events/event_utils.h"
 #include "ui/gfx/image/image.h"
 
 using base::SysUTF16ToNSString;
 
 @implementation BackForwardMenuController
 
@@ skipping 78 matching lines @@
 // Action methods:
 
 - (void)executeMenuItem:(id)sender {
   DCHECK([sender isKindOfClass:[NSMenuItem class]]);
   int menuID = [sender tag];
   int event_flags = ui::EventFlagsFromNative([NSApp currentEvent]);
   model_->ActivatedAt(menuID, event_flags);
 }
 
 @end  // @implementation BackForwardMenuController