Remove deprecated methods related to tracing in browser.py.

tools/perf/measurements/timeline_controller.py

 # Copyright 2014 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.
 from measurements import smooth_gesture_util
 
 from telemetry.core.platform import tracing_category_filter
+from telemetry.core.platform import tracing_options
 from telemetry.timeline.model import TimelineModel
 from telemetry.page.actions import action_runner
 from telemetry.web_perf import timeline_interaction_record as tir_module
 
 
 RUN_SMOOTH_ACTIONS = 'RunSmoothAllActions'
 
 
 class TimelineController(object):
   def __init__(self):
     super(TimelineController, self).__init__()
     self.trace_categories = None
     self._model = None
     self._renderer_process = None
     self._smooth_records = []
     self._interaction = None
 
   def SetUp(self, page, tab):
     """Starts gathering timeline data.
 
     """
     # Resets these member variables incase this object is reused.
     self._model = None
     self._renderer_process = None
-    if not tab.browser.supports_tracing:
+    if not tab.browser.platform.tracing_controller.IsChromeTracingSupported(
+      tab.browser):
       raise Exception('Not supported')
     category_filter = tracing_category_filter.TracingCategoryFilter(
         filter_string=self.trace_categories)
     for delay in page.GetSyntheticDelayCategories():
       category_filter.AddSyntheticDelay(delay)
-    tab.browser.StartTracing(category_filter)
+    options = tracing_options.TracingOptions()
+    options.enable_chrome_trace = True
+    tab.browser.platform.tracing_controller.Start(options, category_filter)
 
   def Start(self, tab):
     # Start the smooth marker for all actions.
     runner = action_runner.ActionRunner(tab)
     self._interaction = runner.BeginInteraction(
         RUN_SMOOTH_ACTIONS, is_smooth=True)
 
   def Stop(self, tab):
     # End the smooth marker for all actions.
     self._interaction.End()
     # Stop tracing.
-    timeline_data = tab.browser.StopTracing()
+    timeline_data = tab.browser.platform.tracing_controller.Stop()
     self._model = TimelineModel(timeline_data)
     self._renderer_process = self._model.GetRendererProcessFromTabId(tab.id)
     renderer_thread = self.model.GetRendererThreadFromTabId(tab.id)
 
     run_smooth_actions_record = None
     self._smooth_records = []
     for event in renderer_thread.async_slices:
       if not tir_module.IsTimelineInteractionRecord(event.name):
         continue
       r = tir_module.TimelineInteractionRecord.FromAsyncEvent(event)
       if r.label == RUN_SMOOTH_ACTIONS:
         assert run_smooth_actions_record is None, (
           'TimelineController cannot issue more than 1 %s record' %
           RUN_SMOOTH_ACTIONS)
         run_smooth_actions_record = r
       elif r.is_smooth:
         self._smooth_records.append(
           smooth_gesture_util.GetAdjustedInteractionIfContainGesture(
             self.model, r))
 
     # If there is no other smooth records, we make measurements on time range
     # marked by timeline_controller itself.
     # TODO(nednguyen): when crbug.com/239179 is marked fixed, makes sure that
     # page sets are responsible for issueing the markers themselves.
     if len(self._smooth_records) == 0 and run_smooth_actions_record:
       self._smooth_records = [run_smooth_actions_record]
 
 
   def CleanUp(self, tab):
-    if tab.browser.is_tracing_running:
-      tab.browser.StopTracing()
+    if tab.browser.platform.tracing_controller.is_tracing_running:
+      tab.browser.platform.tracing_controller.Stop()
 
   @property
   def model(self):
     return self._model
 
   @property
   def renderer_process(self):
     return self._renderer_process
 
   @property
   def smooth_records(self):
     return self._smooth_records