Reland of Port memory.long_running_idle_gmail benchmarks to TBMv2.

tools/perf/page_sets/long_running_idle_google_cases.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.
 
 from telemetry import story
 
 from page_sets import google_pages
 
-STARTUP_TIME_IN_SECONDS = 2
 IDLE_TIME_IN_SECONDS = 100
+SAMPLING_INTERVAL_IN_SECONDS = 1
+STEPS = IDLE_TIME_IN_SECONDS / SAMPLING_INTERVAL_IN_SECONDS
+
+def _IdleAction(action_runner):
+  action_runner.tab.browser.DumpMemory()
+  for _ in xrange(STEPS):
+    action_runner.Wait(SAMPLING_INTERVAL_IN_SECONDS)
+    action_runner.tab.browser.DumpMemory()
 
 def _CreateIdlePageClass(base_page_cls):
   class DerivedIdlePage(base_page_cls):  # pylint: disable=no-init
     def RunPageInteractions(self, action_runner):
-      action_runner.Wait(STARTUP_TIME_IN_SECONDS)
-      with action_runner.CreateInteraction('Begin'):
-        action_runner.tab.browser.DumpMemory()
-      with action_runner.CreateInteraction('Idle'):
-        action_runner.Wait(IDLE_TIME_IN_SECONDS)
-      with action_runner.CreateInteraction('End'):
-        action_runner.tab.browser.DumpMemory()
+      _IdleAction(action_runner)
   return DerivedIdlePage
 
 
 def _CreateIdleBackgroundPageClass(base_page_cls):
   class DerivedIdlePage(base_page_cls):  # pylint: disable=no-init
     def RunPageInteractions(self, action_runner):
       action_runner.tab.browser.tabs.New()
-      action_runner.Wait(IDLE_TIME_IN_SECONDS)
+      _IdleAction(action_runner)
   return DerivedIdlePage
 
 
 class LongRunningIdleGmailPageSet(story.StorySet):
   def __init__(self):
     super(LongRunningIdleGmailPageSet, self).__init__(
         archive_data_file='data/long_running_idle_gmail_page.json',
         cloud_storage_bucket=story.PARTNER_BUCKET)
     self.AddStory(
         _CreateIdlePageClass(google_pages.GmailPage)(self))
 
 
 class LongRunningIdleGmailBackgroundPageSet(story.StorySet):
   def __init__(self):
     # Reuse the wpr of foreground gmail.
     super(LongRunningIdleGmailBackgroundPageSet, self).__init__(
         archive_data_file='data/long_running_idle_gmail_page.json',
         cloud_storage_bucket=story.PARTNER_BUCKET)
     self.AddStory(
         _CreateIdleBackgroundPageClass(google_pages.GmailPage)(self))