Check media permissions through RenderFrameHostDelegate.

content/browser/frame_host/render_frame_host_delegate.h

Index: content/browser/frame_host/render_frame_host_delegate.h
diff --git a/content/browser/frame_host/render_frame_host_delegate.h b/content/browser/frame_host/render_frame_host_delegate.h
index 40af1dba20c272427e2dc4af89622628cd87094e..7fed3f02268672a42268e8cd81cecbcc0cd8efe4 100644
--- a/content/browser/frame_host/render_frame_host_delegate.h
+++ b/content/browser/frame_host/render_frame_host_delegate.h
@@ -130,6 +130,12 @@ class CONTENT_EXPORT RenderFrameHostDelegate {
       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(const GURL& security_origin,
+                                          MediaStreamType type);
+
   // Get the accessibility mode for the WebContents that owns this frame.
   virtual AccessibilityMode GetAccessibilityMode() const;