Check media permissions through RenderFrameHostDelegate.

chrome/browser/media/media_capture_devices_dispatcher.h

Index: chrome/browser/media/media_capture_devices_dispatcher.h
diff --git a/chrome/browser/media/media_capture_devices_dispatcher.h b/chrome/browser/media/media_capture_devices_dispatcher.h
index dcef64445349c27180915ada6a3b9eb701d6c0ce..35454de849704872cad7969522a8a8da62d6dbbf 100644
--- a/chrome/browser/media/media_capture_devices_dispatcher.h
+++ b/chrome/browser/media/media_capture_devices_dispatcher.h
@@ -90,6 +90,14 @@ class MediaCaptureDevicesDispatcher : public content::MediaObserver,
                                   const GURL& security_origin,
                                   content::MediaStreamType type);
 
+  // Method called from WebCapturerDelegate implementations to check media
+  // access permission. Note that this does not query the user. |extension| is
+  // set to NULL if request was made from a drive-by page.
+  bool CheckMediaAccessPermission(content::WebContents* web_contents,
+                                  const GURL& security_origin,
+                                  content::MediaStreamType type,
+                                  const extensions::Extension* extension);
+
   // Helper to get the default devices which can be used by the media request.
   // Uses the first available devices if the default devices are not available.
   // If the return list is empty, it means there is no available device on the