[Telemetry] Move from telemetry WaitFor to py_utils WaitFor

telemetry/telemetry/internal/actions/repaint_continuously.py

Index: telemetry/telemetry/internal/actions/repaint_continuously.py
diff --git a/telemetry/telemetry/internal/actions/repaint_continuously.py b/telemetry/telemetry/internal/actions/repaint_continuously.py
index a8c49579d916beb1eeb00ad101c71fa7218baab7..e1ad4f348a4713bf2aede466577261b23af2b14b 100644
--- a/telemetry/telemetry/internal/actions/repaint_continuously.py
+++ b/telemetry/telemetry/internal/actions/repaint_continuously.py
@@ -4,9 +4,10 @@
 
 import time
 
-from telemetry.core import util
 from telemetry.internal.actions import page_action
 
+import py_utils
+
 
 class RepaintContinuouslyAction(page_action.PageAction):
   """Continuously repaints the visible content by requesting animation frames
@@ -32,4 +33,4 @@ class RepaintContinuouslyAction(page_action.PageAction):
     time.sleep(self._seconds)
     def HasMinRafs():
       return tab.EvaluateJavaScript('window.__rafCount;') >= 3
-    util.WaitFor(HasMinRafs, max(60 - self._seconds, 0))
+    py_utils.WaitFor(HasMinRafs, max(60 - self._seconds, 0))