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

chrome/browser/ui/cocoa/media_picker/desktop_media_picker_controller.mm

 // Copyright 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.
 
 #import "chrome/browser/ui/cocoa/media_picker/desktop_media_picker_controller.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 45 matching lines @@
 - (void)reportResult:(content::DesktopMediaID)sourceID;
 
 // Action handlers.
 - (void)sharePressed:(id)sender;
 - (void)cancelPressed:(id)sender;
 
 @end
 
 @implementation DesktopMediaPickerController
 
-- (id)initWithMediaList:(scoped_ptr<DesktopMediaList>)media_list
+- (id)initWithMediaList:(std::unique_ptr<DesktopMediaList>)media_list
                  parent:(NSWindow*)parent
                callback:(const DesktopMediaPicker::DoneCallback&)callback
                 appName:(const base::string16&)appName
              targetName:(const base::string16&)targetName
            requestAudio:(bool)requestAudio {
   const NSUInteger kStyleMask =
       NSTitledWindowMask | NSClosableWindowMask | NSResizableWindowMask;
   base::scoped_nsobject<NSWindow> window(
       [[NSWindow alloc] initWithContentRect:ui::kWindowSizeDeterminedLater
                                   styleMask:kStyleMask
@@ skipping 328 matching lines @@
 - (void)sourceThumbnailChangedAtIndex:(int)index {
   const DesktopMediaList::Source& source = media_list_->GetSource(index);
   NSImage* image = gfx::NSImageFromImageSkia(source.thumbnail);
 
   DesktopMediaPickerItem* item = [items_ objectAtIndex:index];
   [item setImageRepresentation:image];
   [sourceBrowser_ reloadData];
 }
 
 @end  // @interface DesktopMediaPickerController