telemetry: Add GetRendererProcessFromTab to timeline model.

tools/telemetry/telemetry/page/actions/wait.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import re
 import time
 
 from telemetry.core import util
 from telemetry.page.actions import page_action
 
 class WaitAction(page_action.PageAction):
   def __init__(self, attributes=None):
     self.timeout = 60
     super(WaitAction, self).__init__(attributes)
 
   def RunsPreviousAction(self):
     return (getattr(self, 'condition', None) == 'navigate' or
             getattr(self, 'condition', None) == 'href_change')
 
   def RunAction(self, page, tab, previous_action):
     tab.ExecuteJavaScript(
-        'console.time("' + self.GetTimelineMarkerLabel() + '")')
+        'console.time("' + self.GetTimelineMarkerName() + '")')
 
     if hasattr(self, 'seconds'):
       time.sleep(self.seconds)
 
     elif getattr(self, 'condition', None) == 'navigate':
       if not previous_action:
         raise page_action.PageActionFailed('You need to perform an action '
                                            'before waiting for navigate.')
       previous_action.WillRunAction(page, tab)
       action_to_perform = lambda: previous_action.RunAction(page, tab, None)
@@ skipping 29 matching lines @@
         tab.WaitForJavaScriptExpression('%s != null' % code, self.timeout)
       else:
         raise page_action.PageActionFailed(
             'No element condition given to wait')
     elif hasattr(self, 'javascript'):
       tab.WaitForJavaScriptExpression(self.javascript, self.timeout)
     else:
       raise page_action.PageActionFailed('No wait condition found')
 
     tab.ExecuteJavaScript(
-        'console.timeEnd("' + self.GetTimelineMarkerLabel() + '")')
+        'console.timeEnd("' + self.GetTimelineMarkerName() + '")')
 
-  def GetTimelineMarkerLabel(self):
+  def GetTimelineMarkerName(self):
     return 'WaitAction::RunAction'