[perf] Change google.com to google.co.uk in top_10_mobile_memory and dual_browser page sets.

tools/perf/page_sets/text_selection_sites.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.
 from telemetry import story
 from telemetry.page import page as page_module
 from telemetry.page import shared_page_state
 
 
 class SimplePage(page_module.Page):
 
@@ skipping 133 matching lines @@
 
 
 class TextSelectionSitesPageSet(story.StorySet):
   def __init__(self):
     super(TextSelectionSitesPageSet, self).__init__(
       archive_data_file='data/top_10_mobile.json',
       cloud_storage_bucket=story.PARTNER_BUCKET)
 
     # A subset of top_10_mobile page set
     page_urls = [
-        'https://www.google.com/#hl=en&q=science',
+        'https://www.google.co.uk/#hl=en&q=science',
         'https://m.facebook.com/rihanna',
         'http://search.yahoo.com/search;_ylt=?p=google',
         'http://www.baidu.com/s?word=google',
         'https://mobile.twitter.com/justinbieber?skip_interstitial=true',
         'http://yandex.ru/touchsearch?text=science'
     ]
 
     for url in page_urls:
       self.AddStory(SimpleTextSelectionPage(url, self))