Made desktop capture screen tab-constrained in ASH

chrome/browser/ui/cocoa/media_picker/desktop_media_picker_cocoa.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.
 
 #include "chrome/browser/ui/cocoa/media_picker/desktop_media_picker_cocoa.h"
 
 #import "chrome/browser/ui/cocoa/media_picker/desktop_media_picker_controller.h"
 
 DesktopMediaPickerCocoa::DesktopMediaPickerCocoa() {
 }
 
 DesktopMediaPickerCocoa::~DesktopMediaPickerCocoa() {
 }
 
-void DesktopMediaPickerCocoa::Show(gfx::NativeWindow context,
+void DesktopMediaPickerCocoa::Show(content::WebContents* web_contents,
+                                   gfx::NativeWindow context,
                                    gfx::NativeWindow parent,
                                    const base::string16& app_name,
                                    const base::string16& target_name,
                                    scoped_ptr<DesktopMediaList> media_list,
                                    const DoneCallback& done_callback) {
   controller_.reset(
       [[DesktopMediaPickerController alloc] initWithMediaList:media_list.Pass()
                                                        parent:parent
                                                      callback:done_callback
                                                       appName:app_name
                                                    targetName:target_name]);
   [controller_ showWindow:nil];
 }
 
 // static
 scoped_ptr<DesktopMediaPicker> DesktopMediaPicker::Create() {
   return scoped_ptr<DesktopMediaPicker>(new DesktopMediaPickerCocoa());
 }