[chromedriver] Require chrome 28+. Don't test against 27.

chrome/test/chromedriver/archive.py

 # Copyright (c) 2013 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.
 
 """Downloads items from the Chromium continuous archive."""
 
 import os
 import platform
 import urllib
 
 import util
 
-CHROME_27_REVISION = '190466'
 CHROME_28_REVISION = '198276'
 CHROME_29_REVISION = '208261'
+CHROME_30_REVISION = '217281'
 
 _SITE = 'http://commondatastorage.googleapis.com'
 
 
 class Site(object):
   CONTINUOUS = _SITE + '/chromium-browser-continuous'
   SNAPSHOT = _SITE + '/chromium-browser-snapshots'
 
 
 def GetLatestRevision(site=Site.CONTINUOUS):
@@ skipping 45 matching lines @@
   """Returns the name for this platform on the archive site."""
   if util.IsWindows():
     return 'Win'
   elif util.IsMac():
     return 'Mac'
   elif util.IsLinux():
     if platform.architecture()[0] == '64bit':
       return 'Linux_x64'
     else:
       return 'Linux'