[telemetry] Clean up image decoding benchmark

tools/telemetry/telemetry/page.py

 # Copyright (c) 2012 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.
 import os
 import re
 import time
 import urlparse
 
 from telemetry import util
 
@@ skipping 49 matching lines @@
 
   def __str__(self):
     return self.url
 
   def WaitToLoad(self, tab, timeout, poll_interval=0.1):
     Page.WaitForPageToLoad(self, tab, timeout, poll_interval)
 
   @staticmethod
   def WaitForPageToLoad(obj, tab, timeout, poll_interval=0.1):
     """Waits for various wait conditions present in obj."""
+    if hasattr(obj, 'post_navigate_javascript_to_execute'):
+      tab.runtime.Evaluate(obj.post_navigate_javascript_to_execute)
+
     if hasattr(obj, 'wait_seconds'):
       time.sleep(obj.wait_seconds)
     if hasattr(obj, 'wait_for_element_with_text'):
       callback_code = 'function(element) { return element != null; }'
       util.WaitFor(
           lambda: util.FindElementAndPerformAction(
               tab, obj.wait_for_element_with_text, callback_code),
           timeout, poll_interval)
     if hasattr(obj, 'wait_for_element_with_selector'):
       util.WaitFor(lambda: tab.runtime.Evaluate(
            'document.querySelector(\'' + obj.wait_for_element_with_selector +
            '\') != null'), timeout, poll_interval)
     if hasattr(obj, 'wait_for_javascript_expression'):
       util.WaitFor(
           lambda: tab.runtime.Evaluate(obj.wait_for_javascript_expression),
           timeout, poll_interval)