Implement ubertracing.

tools/telemetry/telemetry/core/backends/browser_backend.py

 # Copyright 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.
 
 from telemetry import decorators
 from telemetry.core import platform
 from telemetry.core import web_contents
 from telemetry.core.backends import app_backend
 from telemetry.core.forwarders import do_nothing_forwarder
 
@@ skipping 61 matching lines @@
   @property
   def forwarder_factory(self):
     if not self._forwarder_factory:
       self._forwarder_factory = do_nothing_forwarder.DoNothingForwarderFactory()
     return self._forwarder_factory
 
   def StartTracing(self, trace_options, custom_categories=None,
                    timeout=web_contents.DEFAULT_WEB_CONTENTS_TIMEOUT):
     raise NotImplementedError()
 
-  def StopTracing(self):
+  def StopTracing(self, trace_data_builder):
     raise NotImplementedError()
 
   def GetRemotePort(self, port):
     return port
 
   def Start(self):
     raise NotImplementedError()
 
   def IsBrowserRunning(self):
     raise NotImplementedError()
 
   def IsAppRunning(self):
     return self.IsBrowserRunning()
 
   def GetStandardOutput(self):
     raise NotImplementedError()
 
   def GetStackTrace(self):
     raise NotImplementedError()
 
   def GetSystemInfo(self):
     raise NotImplementedError()