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 162c65431776e9e1800a3eacd870aa3f2f5b1208..a6930ad52979b6eeb918baab6b3c280bc7f5d606 100644
--- a/chrome/browser/media/media_capture_devices_dispatcher.h
+++ b/chrome/browser/media/media_capture_devices_dispatcher.h
@@ -90,6 +90,20 @@ 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.
+  bool CheckMediaAccessPermission(content::WebContents* web_contents,
+                                  const GURL& security_origin,
+                                  content::MediaStreamType type);
+
+  // Same as above but for an |extension|, which may not be NULL.
+#if defined(ENABLE_EXTENSIONS)
+  bool CheckMediaAccessPermission(content::WebContents* web_contents,
+                                  const GURL& security_origin,
+                                  content::MediaStreamType type,
+                                  const extensions::Extension* extension);
+#endif
+
   // 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