unique_ptr_migration: clean up references to scoped_ptr as of r389721

ui/message_center/cocoa/popup_collection.h

 // Copyright (c) 2013 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.
 
 #ifndef UI_MESSAGE_CENTER_COCOA_POPUP_COLLECTION_H_
 #define UI_MESSAGE_CENTER_COCOA_POPUP_COLLECTION_H_
 
 #import <Cocoa/Cocoa.h>
 
+#include <memory>
 #include <set>
 
 #include "base/mac/scoped_block.h"
 #import "base/mac/scoped_nsobject.h"
-#import "base/memory/scoped_ptr.h"
 #include "ui/message_center/message_center_export.h"
 
 namespace message_center {
 class MessageCenter;
 class MessageCenterObserver;
 }
 
 namespace message_center {
 typedef void(^AnimationEndedCallback)();
 }
@@ skipping 67 matching lines @@
 // to a very small value to expedite the test running.
 - (void)setAnimationDuration:(NSTimeInterval)duration;
 
 // Setter for testingAnimationEndedCallback_. The testing code could set it
 // to get called back when the animation ends.
 - (void)setAnimationEndedCallback:
     (message_center::AnimationEndedCallback)callback;
 @end
 
 #endif  // UI_MESSAGE_CENTER_COCOA_POPUP_COLLECTION_H_