Check media permissions through RenderFrameHostDelegate.

chrome/browser/extensions/chrome_extension_host_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 CHROME_BROWSER_EXTENSIONS_CHROME_EXTENSION_HOST_DELEGATE_H_
 #define CHROME_BROWSER_EXTENSIONS_CHROME_EXTENSION_HOST_DELEGATE_H_
 
 #include "extensions/browser/extension_host_delegate.h"
 
 namespace extensions {
@@ skipping 14 matching lines @@
   virtual void CreateTab(content::WebContents* web_contents,
                          const std::string& extension_id,
                          WindowOpenDisposition disposition,
                          const gfx::Rect& initial_pos,
                          bool user_gesture) OVERRIDE;
   virtual void ProcessMediaAccessRequest(
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback,
       const Extension* extension) OVERRIDE;
+  virtual bool CheckMediaAccessPermission(content::WebContents* web_contents,
+                                          const GURL& security_origin,
+                                          content::MediaStreamType type,
+                                          const Extension* extension) OVERRIDE;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_CHROME_EXTENSION_HOST_DELEGATE_H_