Add {Will,Did}StartBrowser to record_wpr

tools/telemetry/telemetry/page/record_wpr.py

 #!/usr/bin/env python
 # Copyright 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 logging
 import sys
 import time
 
 from telemetry import benchmark
 from telemetry.core import browser_options
@@ skipping 21 matching lines @@
     """Override to ensure all resources are fetched from network."""
     tab.ClearCache(force=False)
     if self.page_test:
       self.page_test.options = self.options
       self.page_test.WillNavigateToPage(page, tab)
 
   def DidNavigateToPage(self, page, tab):
     if self.page_test:
       self.page_test.DidNavigateToPage(page, tab)
 
+  def WillStartBrowser(self, browser):
+    if self.page_test:
+      self.page_test.WillStartBrowser(browser)
+
+  def DidStartBrowser(self, browser):
+    if self.page_test:
+      self.page_test.DidStartBrowser(browser)
+
   def WillRunActions(self, page, tab):
     if self.page_test:
       self.page_test.WillRunActions(page, tab)
 
   def DidRunActions(self, page, tab):
     if self.page_test:
       self.page_test.DidRunActions(page, tab)
 
   def ValidatePage(self, page, tab, results):
     if self.page_test:
@@ skipping 74 matching lines @@
     self._parser = self._options.CreateParser(usage='%prog <PageSet|Benchmark>')
     self._AddCommandLineArgs()
     self._ParseArgs(args)
     self._ProcessCommandLineArgs()
     self._page_set = self._GetPageSet(base_dir, target)
 
   @property
   def options(self):
     return self._options
 
+  @property
+  def page_test(self):
+    return self._record_page_test.page_test if self._benchmark else None
+
   def _CreateOptions(self):
     options = browser_options.BrowserFinderOptions()
     options.browser_options.wpr_mode = wpr_modes.WPR_RECORD
     options.browser_options.no_proxy_server = True
     return options
 
   def _AddCommandLineArgs(self):
     page_runner.AddCommandLineArgs(self._parser)
     if self._benchmark is not None:
       self._benchmark.AddCommandLineArgs(self._parser)
@@ skipping 34 matching lines @@
 def Main(base_dir):
   quick_args = [a for a in sys.argv[1:] if not a.startswith('-')]
   if len(quick_args) != 1:
     print >> sys.stderr, 'Usage: record_wpr <PageSet|Benchmark>\n'
     sys.exit(1)
   target = quick_args.pop()
   wpr_recorder = WprRecorder(base_dir, target)
   results = wpr_recorder.Record()
   wpr_recorder.HandleResults(results)
   return min(255, len(results.failures))