[telemetry] Implement first version of timeline based measurement

tools/telemetry/telemetry/core/timeline/model.py

 # Copyright (c) 2013 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.
 '''A container for timeline-based events and traces and can handle importing
 raw event data from different sources. This model closely resembles that in the
 trace_viewer project:
 https://code.google.com/p/trace-viewer/
 '''
 
 from operator import attrgetter
@@ skipping 209 matching lines @@
       if event.name != names[i]:
         raise MarkerMismatchError()
     for i in xrange(0, len(events)):
       for j in xrange(i+1, len(events)):
         if (events[j].start < events[i].start + events[i].duration):
           raise MarkerOverlapError()
 
     return events
 
   def GetRendererProcessFromTab(self, tab):
+    return self._core_object_to_timeline_container_map[tab].parent
+
+  def GetRendererThreadFromTab(self, tab):
     return self._core_object_to_timeline_container_map[tab]
 
   def AddCoreObjectToContainerMapping(self, core_object, container):
     """ Add a mapping from a core object to a timeline container.
 
     Used for example to map a Tab to its renderer process in the timeline model.
     """
     assert(isinstance(core_object, web_contents.WebContents) or
            isinstance(core_object, browser.Browser))
     self._core_object_to_timeline_container_map[core_object] = container
 
   def _CreateImporter(self, event_data):
     for importer_class in _IMPORTERS:
       if importer_class.CanImport(event_data):
         return importer_class(self, event_data)
     raise ValueError("Could not find an importer for the provided event data")