Mock timer for Telemetry unit tests

tools/telemetry/telemetry/unittest/simple_mock.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.
 """A very very simple mock object harness."""
 
 DONT_CARE = ''
 
 class MockFunctionCall(object):
   def __init__(self, name):
     self.name = name
@@ skipping 75 matching lines @@
           repr(got_call))
       expected_call = self._trace.expected_calls[
         self._trace.next_call_index]
       expected_call.VerifyEquals(got_call)
       self._trace.next_call_index += 1
       for h in expected_call.when_called_handlers:
         h(*args)
       return expected_call.return_value
     handler.is_hook = True
     setattr(self, func_name, handler)
+
+
+class MockTimer(object):
+  def __init__(self):
+    self._elapsed_time = 0
+
+  def Sleep(self, time):
+    self._elapsed_time += time
+
+  def GetTime(self):
+    return self._elapsed_time