[chromedriver] Remove unnecessary round trips to Chrome.

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 934 matching lines @@
         '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../net/net.gyp:net',
         '../ui/ui.gyp:ui',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         '../third_party/webdriver/atoms.cc',
         '../third_party/webdriver/atoms.h',
+        'test/chromedriver/alert_commands.cc',
+        'test/chromedriver/alert_commands.h',
         'test/chromedriver/basic_types.cc',
         'test/chromedriver/basic_types.h',
         'test/chromedriver/capabilities.cc',
         'test/chromedriver/capabilities.h',
         'test/chromedriver/chrome_launcher.cc',
         'test/chromedriver/chrome_launcher.h',
         'test/chromedriver/chromedriver.cc',
         'test/chromedriver/chromedriver.h',
         'test/chromedriver/command.h',
         'test/chromedriver/command_executor.h',
@@ skipping 2422 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/browser_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }