Bug 1579583 - Restore repaint() manifest handler, r=jlast.

Differential Revision: https://phabricator.services.mozilla.com/D45123

--HG--
extra : moz-landing-system : lando

devtools/server/actors/replay/replay.js

@@ -1659,6 +1659,11 @@ function divergeFromRecording() {
 }
 
 const gRequestHandlers = {
+  repaint() {
+    divergeFromRecording();
+    return RecordReplayControl.repaint();
+  },
+
   /////////////////////////////////////////////////////////
   // Debugger Requests
   /////////////////////////////////////////////////////////