Telemetry / Devtools TraceHandler: exposes tracing via dev tools.

tools/telemetry/telemetry/browser.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 os
 
 from telemetry import temporary_http_server
 from telemetry import browser_credentials
 from telemetry import wpr_modes
 from telemetry import wpr_server
 
@@ skipping 36 matching lines @@
     return self._backend.is_content_shell
 
   @property
   def supports_tab_control(self):
     return self._backend.supports_tab_control
 
   @property
   def tabs(self):
     return self._backend.tabs
 
+  @property
+  def supports_tracing(self):
+    return self._backend.supports_tracing
+
+  def StartTracing(self):
+    return self._backend.StartTracing()
+
+  def StopTracing(self):
+    return self._backend.StopTracing()
+
+  def GetTrace(self):
+    return self._backend.GetTrace()
+
   def Close(self):
     """Closes this browser."""
     if self._wpr_server:
       self._wpr_server.Close()
       self._wpr_server = None
 
     if self._http_server:
       self._http_server.Close()
       self._http_server = None
 
@@ skipping 32 matching lines @@
 
     if self._backend.wpr_mode == wpr_modes.WPR_OFF:
       return
 
     use_record_mode = self._backend.wpr_mode == wpr_modes.WPR_RECORD
     if not use_record_mode:
       assert os.path.isfile(archive_path)
 
     self._wpr_server = wpr_server.ReplayServer(
       self._backend, archive_path, use_record_mode)