[Telemetry] Remove waits in telemetry_perf_unittests.

tools/telemetry/telemetry/page/actions/action_runner.py

Index: tools/telemetry/telemetry/page/actions/action_runner.py
diff --git a/tools/telemetry/telemetry/page/actions/action_runner.py b/tools/telemetry/telemetry/page/actions/action_runner.py
index 1bd11d3514268b767343445afc517d36315fbd24..7798a8ab6929a4f5cfdb9cf8178942b7ac2d5634 100644
--- a/tools/telemetry/telemetry/page/actions/action_runner.py
+++ b/tools/telemetry/telemetry/page/actions/action_runner.py
@@ -22,8 +22,9 @@ from telemetry.web_perf import timeline_interaction_record
 
 class ActionRunner(object):
 
-  def __init__(self, tab):
+  def __init__(self, tab, skip_waits=False):
     self._tab = tab
+    self._skip_waits = skip_waits
 
   def _RunAction(self, action):
     action.WillRunAction(self._tab)
@@ -153,7 +154,8 @@ class ActionRunner(object):
     Args:
       seconds: The number of seconds to wait.
     """
-    time.sleep(seconds)
+    if not self._skip_waits:
+      time.sleep(seconds)
 
   def WaitForJavaScriptCondition(self, condition, timeout_in_seconds=60):
     """Wait for a JavaScript condition to become true.