Adds support for media permission request handling on <appview> tag.

extensions/browser/guest_view/app_view/app_view_guest_delegate.h

 // 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.
 
 #ifndef EXTENSIONS_BROWSER_GUEST_VIEW_APP_VIEW_APP_VIEW_GUEST_DELEGATE_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_APP_VIEW_APP_VIEW_GUEST_DELEGATE_H_
 
 namespace content {
 struct ContextMenuParams;
 class WebContents;
 }
 
 namespace extensions {
+class AppDelegate;
+
 // Interface to handle communication between AppView (in extensions) with the
 // browser.
 class AppViewGuestDelegate {
  public:
   virtual ~AppViewGuestDelegate();
 
   // Shows the context menu for the guest.
   // Returns true if the context menu was handled.
   virtual bool HandleContextMenu(content::WebContents* web_contents,
                                  const content::ContextMenuParams& params) = 0;
+
+  // Returns an AppDelegate to be used by the AppViewGuest.
+  virtual AppDelegate* CreateAppDelegate() = 0;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_APP_VIEW_APP_VIEW_GUEST_DELEGATE_H_