Forward {Will/Did}StartBrowser calls to page test

tools/telemetry/telemetry/page/record_wpr_unittest.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.
 
 import os
 import sys
 
 from telemetry import benchmark
 from telemetry.core import util
 from telemetry.core import wpr_modes
@@ skipping 49 matching lines @@
 
   def WillRunActions(self, page, tab):
     self.func_calls.append('WillRunActions')
 
   def DidRunActions(self, page, tab):
     self.func_calls.append('DidRunActions')
 
   def ValidatePage(self, page, tab, results):
     self.func_calls.append('ValidatePage')
 
+  def WillStartBrowser(self, browser):
+    self.func_calls.append('WillStartBrowser')
+
+  def DidStartBrowser(self, browser):
+    self.func_calls.append('DidStartBrowser')
 
 class MockBenchmark(benchmark.Benchmark):
   test = MockPageTest
   mock_page_set = None
 
   @classmethod
   def AddTestCommandLineArgs(cls, group):
     group.add_option('', '--mock-benchmark-url', action='store', type='string')
 
   def CreatePageSet(self, options):
@@ skipping 101 matching lines @@
                      wpr_recorder.options.browser_options.wpr_mode)
 
   def testFindAllActionNames(self):
     # The src/tools/telemetry/unittest_data/page_measurements/ has been
     # populated with three simple Page Measurement classes, the first two of
     # which have action_name_to_run defined.
     action_names_to_run = record_wpr.FindAllActionNames(self._test_data_dir)
     self.assertTrue('RunFoo' in action_names_to_run)
     self.assertTrue('RunBar' in action_names_to_run)
     self.assertFalse('RunBaz' in action_names_to_run)
+
+  # When the RecorderPageTest WillStartBrowser/DidStartBrowser function is
+  # called, it forwards the call to the PageTest
+  def testRecorderPageTest_BrowserMethods(self):
+    record_page_test = record_wpr.RecorderPageTest([])
+    record_page_test.page_test = MockBenchmark().test()
+    record_page_test.WillStartBrowser(self._tab.browser)
+    record_page_test.DidStartBrowser(self._tab.browser)
+    self.assertTrue('WillStartBrowser' in record_page_test.page_test.func_calls)
+    self.assertTrue('DidStartBrowser' in record_page_test.page_test.func_calls)