Check media permissions through RenderFrameHostDelegate.

extensions/browser/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 EXTENSIONS_BROWSER_EXTENSION_HOST_DELEGATE_H_
 #define EXTENSIONS_BROWSER_EXTENSION_HOST_DELEGATE_H_
 
 #include <string>
 
 #include "content/public/common/media_stream_request.h"
@@ skipping 38 matching lines @@
                          const gfx::Rect& initial_pos,
                          bool user_gesture) = 0;
 
   // Requests access to an audio or video media stream. Invokes |callback|
   // with the response.
   virtual void ProcessMediaAccessRequest(
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback,
       const Extension* extension) = 0;
+
+  // Checks if we have permission to access the microphone or camera. Note that
+  // this does not query the user. |type| must be MEDIA_DEVICE_AUDIO_CAPTURE
+  // or MEDIA_DEVICE_VIDEO_CAPTURE.
+  virtual bool CheckMediaAccessPermission(content::WebContents* web_contents,
+                                          const GURL& security_origin,
+                                          content::MediaStreamType type,
+                                          const Extension* extension) = 0;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_HOST_DELEGATE_H_