Add cpuTimeMetric to BattOr benchmark.

tools/perf/page_sets/idle_after_loading_stories.py

 # Copyright 2016 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.page import page as page_module
 from telemetry import story
 
 # Chrome has high idle CPU usage on these sites, even after they have quiesced.
 SITES = [
   # https://bugs.chromium.org/p/chromium/issues/detail?id=638365
   'http://www.labradortraininghq.com/labrador-training/how-to-crate-train'
   '-a-puppy/#How_Long_DoesIt_Take_To_Crate_Train_A_Puppy',
 
   # https://bugs.chromium.org/p/chromium/issues/detail?id=505990
-  'http://abcnews.go.com/',
+  # TODO(charliea): Temporarily disable this site, since it causes tracing to
+  # explode from too much data. https://crbug.com/647398
+  # 'http://abcnews.go.com/',
 
   # https://bugs.chromium.org/p/chromium/issues/detail?id=505601
   'http://www.slideshare.net/patrickmeenan',
 
   # https://bugs.chromium.org/p/chromium/issues/detail?id=505577
   'http://tumblr.all-that-is-interesting.com/',
 
   # https://bugs.chromium.org/p/chromium/issues/detail?id=505553
   'https://instagram.com/cnn/',
 
@@ skipping 45 matching lines @@
 
   def __init__(self, wait_in_seconds=0):
     super(IdleAfterLoadingStories, self).__init__(
         archive_data_file='data/idle_after_loading_stories.json',
         cloud_storage_bucket=story.PARTNER_BUCKET)
 
     # Chrome has high idle CPU usage on this site, even after its quiesced.
     # https://crbug.com/638365.
     for url in SITES:
       self.AddStory(_BasePage(self, url, wait_in_seconds))