Implements AddStartupEventsForTelemetry() in startup_metric_utils.cc for in-coming startup telemetry

tools/perf/page_sets/startup_pages.py

Index: tools/perf/page_sets/startup_pages.py
diff --git a/tools/perf/page_sets/startup_pages.py b/tools/perf/page_sets/startup_pages.py
index 2ca04aedf73f41e514553b414202257a246d1f4b..8b2453a69f3253c6a17c08ee0bf0965e9e24a63c 100644
--- a/tools/perf/page_sets/startup_pages.py
+++ b/tools/perf/page_sets/startup_pages.py
@@ -2,9 +2,22 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 from telemetry.page import page as page_module
+from telemetry.page import shared_page_state
 from telemetry import story
 
 
+class BrowserStartupSharedState(shared_page_state.SharedPageState):
+  """Shared state that restarts the browser for every single story.
+  """
+
+  def __init__(self, test, finder_options, story_set):
+    super(BrowserStartupSharedState, self).__init__(
+        test, finder_options, story_set)
+
+  def DidRunStory(self, results):
+    super(BrowserStartupSharedState, self).DidRunStory(results)
+    self._StopBrowser()
+
 class StartedPage(page_module.Page):
 
   def __init__(self, url, startup_url, page_set):
@@ -39,3 +52,39 @@ class StartupPagesPageSet(story.StorySet):
     # Horribly complex page - stress test!
     self.AddStory(StartedPage(
         'http://kapook.com', 'http://kapook.com', self))
+
+
+class StartedPageTBM(page_module.Page):
+
+  def __init__(self, url, page_set):
+    super(StartedPageTBM, self).__init__(
+        url=url, page_set=page_set, startup_url=url,
+        shared_page_state_class=
+            BrowserStartupSharedState)
+    self.archive_data_file = 'data/startup_pages.json'
+
+  def RunNavigateSteps(self, action_runner):
+    # Do not call super.RunNavigateSteps() to not reload the page that has
+    # already been opened with startup_url.
+    pass
+
+
+class StartupPagesPageSetTBM(story.StorySet):
+
+  """ Pages for testing starting Chrome with a URL.
+  Note that this file can't be used with record_wpr, since record_wpr requires
+  a true navigate step, which we do not want for startup testing. Instead use
+  record_wpr startup_pages_record to record data for this test.
+  """
+
+  def __init__(self):
+    super(StartupPagesPageSetTBM, self).__init__(
+        archive_data_file='data/startup_pages.json',
+        cloud_storage_bucket=story.PARTNER_BUCKET)
+
+    # Typical page.
+    self.AddStory(StartedPageTBM('about:blank', self))
+    # Typical page.
+    self.AddStory(StartedPageTBM('http://bbc.co.uk', self))
+    # Horribly complex page - stress test!
+    self.AddStory(StartedPageTBM('http://kapook.com', self))