[chromedriver] Fix race where we might not wait for page load after navigating.

chrome/chrome_tests.gypi

 # Copyright 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.
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 796 matching lines @@
         'test/chromedriver/chrome/chrome_impl.cc',
         'test/chromedriver/chrome/chrome_impl.h',
         'test/chromedriver/chrome/console_logger.cc',
         'test/chromedriver/chrome/console_logger.h',
         'test/chromedriver/chrome/device_manager.cc',
         'test/chromedriver/chrome/device_manager.h',
         'test/chromedriver/chrome/devtools_client.cc',
         'test/chromedriver/chrome/devtools_client.h',
         'test/chromedriver/chrome/devtools_client_impl.cc',
         'test/chromedriver/chrome/devtools_client_impl.h',
+        'test/chromedriver/chrome/devtools_event_listener.cc',
         'test/chromedriver/chrome/devtools_event_listener.h',
         'test/chromedriver/chrome/devtools_http_client.cc',
         'test/chromedriver/chrome/devtools_http_client.h',
         'test/chromedriver/chrome/dom_tracker.cc',
         'test/chromedriver/chrome/dom_tracker.h',
         'test/chromedriver/chrome/frame_tracker.cc',
         'test/chromedriver/chrome/frame_tracker.h',
         'test/chromedriver/chrome/geolocation_override_manager.cc',
         'test/chromedriver/chrome/geolocation_override_manager.h',
         'test/chromedriver/chrome/geoposition.h',
@@ skipping 2561 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/browser_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }