Use RenderFrameHost for ::RequestPermission() and ::CancelPermission().

chromecast/browser/cast_permission_manager.h

Index: chromecast/browser/cast_permission_manager.h
diff --git a/chromecast/browser/cast_permission_manager.h b/chromecast/browser/cast_permission_manager.h
index c82f08a4be2d2e3f7ba9ec7f0e1efbb0c954c628..237eff99306cbfae47104e4bfee32ba0a356e779 100644
--- a/chromecast/browser/cast_permission_manager.h
+++ b/chromecast/browser/cast_permission_manager.h
@@ -20,13 +20,13 @@ class CastPermissionManager : public content::PermissionManager {
   // content::PermissionManager implementation:
   void RequestPermission(
       content::PermissionType permission,
-      content::WebContents* web_contents,
+      content::RenderFrameHost* render_frame_host,
       int request_id,
       const GURL& requesting_origin,
       bool user_gesture,
       const base::Callback<void(content::PermissionStatus)>& callback) override;
   void CancelPermissionRequest(content::PermissionType permission,
-                               content::WebContents* web_contents,
+                               content::RenderFrameHost* render_frame_host,
                                int request_id,
                                const GURL& requesting_origin) override;
   void ResetPermission(content::PermissionType permission,