Check media permissions through RenderFrameHostDelegate.

extensions/browser/extension_host_delegate.h

Index: extensions/browser/extension_host_delegate.h
diff --git a/extensions/browser/extension_host_delegate.h b/extensions/browser/extension_host_delegate.h
index 0bf52a45bf26eb6f99868cdbd058729efd7886f5..b14580d5f76dbfc8c66e82ce9c6dacf22919057f 100644
--- a/extensions/browser/extension_host_delegate.h
+++ b/extensions/browser/extension_host_delegate.h
@@ -56,6 +56,14 @@ class ExtensionHostDelegate {
       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