Made desktop capture screen tab-constrained in ASH

chrome/browser/media/desktop_media_picker.h

 // 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.
 
 #ifndef CHROME_BROWSER_MEDIA_DESKTOP_MEDIA_PICKER_H_
 #define CHROME_BROWSER_MEDIA_DESKTOP_MEDIA_PICKER_H_
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "content/public/browser/desktop_media_id.h"
 #include "ui/gfx/native_widget_types.h"
 
 class DesktopMediaList;
 
+namespace content {
+class WebContents;
+}
+
 // Abstract interface for desktop media picker UI. It's used by Desktop Media
 // API to let user choose a desktop media source.
 class DesktopMediaPicker {
  public:
   typedef base::Callback<void(content::DesktopMediaID)> DoneCallback;
 
   // Creates default implementation of DesktopMediaPicker for the current
   // platform.
   static scoped_ptr<DesktopMediaPicker> Create();
 
   DesktopMediaPicker() {}
   virtual ~DesktopMediaPicker() {}
 
   // Shows dialog with list of desktop media sources (screens, windows, tabs)
   // provided by |list| and calls |done_callback| when user chooses one of the
   // sources or closes the dialog.
-  virtual void Show(gfx::NativeWindow context,
+  virtual void Show(content::WebContents* web_contents,
+                    gfx::NativeWindow context,
                     gfx::NativeWindow parent,
                     const base::string16& app_name,
                     const base::string16& target_name,
                     scoped_ptr<DesktopMediaList> list,
                     const DoneCallback& done_callback) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DesktopMediaPicker);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_DESKTOP_MEDIA_PICKER_H_