Check media permissions through RenderFrameHostDelegate.

content/public/browser/web_contents_delegate.h

Index: content/public/browser/web_contents_delegate.h
diff --git a/content/public/browser/web_contents_delegate.h b/content/public/browser/web_contents_delegate.h
index b9aa02d8aba2377a0b6690bdba46604f96caa336..d0402561ae6a6b49255862642fa91f54b05ab0c4 100644
--- a/content/public/browser/web_contents_delegate.h
+++ b/content/public/browser/web_contents_delegate.h
@@ -444,6 +444,13 @@ class CONTENT_EXPORT WebContentsDelegate {
       const MediaStreamRequest& request,
       const MediaResponseCallback& callback);
 
+  // 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(WebContents* web_contents,
+                                          const GURL& security_origin,
+                                          MediaStreamType type);
+
   // Requests permission to access the PPAPI broker. The delegate should return
   // true and call the passed in |callback| with the result, or return false
   // to indicate that it does not support asking for permission.