Replace scoped_ptr with std::unique_ptr in //ui

ui/views/widget/native_widget_mac.mm

 // Copyright 2014 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.
 
 #include "ui/views/widget/native_widget_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include <utility>
 
@@ skipping 353 matching lines @@
   [window performSelector:@selector(close) withObject:nil afterDelay:0];
 }
 
 void NativeWidgetMac::CloseNow() {
   if (!bridge_)
     return;
 
   // Notify observers while |bridged_| is still valid.
   delegate_->OnNativeWidgetDestroying();
   // Reset |bridge_| to NULL before destroying it.
-  scoped_ptr<BridgedNativeWidget> bridge(std::move(bridge_));
+  std::unique_ptr<BridgedNativeWidget> bridge(std::move(bridge_));
 }
 
 void NativeWidgetMac::Show() {
   ShowWithWindowState(ui::SHOW_STATE_NORMAL);
 }
 
 void NativeWidgetMac::Hide() {
   if (!bridge_)
     return;
 
@@ skipping 346 matching lines @@
   [[ViewsNSWindowCloseAnimator alloc] initWithWindow:window];
 }
 
 - (void)animationDidEnd:(NSAnimation*)animation {
   [window_ close];
   [animation_ setDelegate:nil];
   [self release];
 }
 
 @end