Reland of Track telemetry benchmark cycle time

telemetry/telemetry/testing/fakes/__init__.py

 # Copyright 2015 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.
 
 """Provides fakes for several of Telemetry's internal objects.
 
 These allow code like story_runner and Benchmark to be run and tested
 without compiling or starting a browser. Class names prepended with an
 underscore are intended to be implementation details, and should not
 be subclassed; however, some, like _FakeBrowser, have public APIs that
@@ skipping 38 matching lines @@
   def CanMonitorThermalThrottling(self):
     return False
 
   def IsThermallyThrottled(self):
     return False
 
   def HasBeenThermallyThrottled(self):
     return False
 
   def GetDeviceTypeName(self):
-    raise NotImplementedError
+    return 'FakeDevice'
 
   def GetArchName(self):
     raise NotImplementedError
 
   def GetOSName(self):
-    raise NotImplementedError
+    return 'FakeOS'
 
   def GetOSVersionName(self):
     raise NotImplementedError
 
   def StopAllLocalServers(self):
     pass
 
   def WaitForTemperature(self, _):
     pass
 
@@ skipping 219 matching lines @@
   def StopTracing(self):
     self._is_tracing = False
 
   @property
   def is_tracing_running(self):
     return self._is_tracing
 
   def ClearStateIfNeeded(self):
     pass
 
+  def IsChromeTracingSupported(self):
+    return True
+
 
 class _FakeNetworkController(object):
   def __init__(self):
     self.wpr_mode = None
     self.extra_wpr_args = None
     self.is_initialized = False
     self.is_open = False
     self.use_live_traffic = None
 
   def InitializeIfNeeded(self, use_live_traffic=False):
@@ skipping 212 matching lines @@
 
   def __del__(self):
     self.Restore()
 
   def Restore(self):
     if self._module:
       self._module.time = self._actual_time
       self._module = None
       self._actual_time = None