Add trace events for some of telemetry internal functions

telemetry/telemetry/internal/actions/page_action.py

Index: telemetry/telemetry/internal/actions/page_action.py
diff --git a/telemetry/telemetry/internal/actions/page_action.py b/telemetry/telemetry/internal/actions/page_action.py
index a77d29619802cab631322047832e7591cc401c11..86c0d0f435818818f68678a8d4a2b4ee3f0c628f 100644
--- a/telemetry/telemetry/internal/actions/page_action.py
+++ b/telemetry/telemetry/internal/actions/page_action.py
@@ -4,8 +4,12 @@
 
 import re
 
+from py_trace_event import trace_event
+
 from telemetry import decorators
 
+

[petrcermak, 2016/09/07 09:38:24]

nit: there should be only 2 blank lines (please remove one)

[nednguyen, 2016/09/07 17:26:12]

Done.

+
 GESTURE_SOURCE_DEFAULT = 'DEFAULT'
 GESTURE_SOURCE_MOUSE = 'MOUSE'
 GESTURE_SOURCE_TOUCH = 'TOUCH'
@@ -23,6 +27,8 @@ class PageActionFailed(Exception):
 class PageAction(object):
   """Represents an action that a user might try to perform to a page."""
 
+  __metaclass__ = trace_event.TracedMetaClass
+
   def WillRunAction(self, tab):
     """Override to do action-specific setup before
     Test.WillRunAction is called."""