Enhance and refactor ChromeDriver's capability handling. Log warning for

chrome/chrome_tests.gypi

 # Copyright (c) 2011 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',
@@ skipping 910 matching lines @@
         'test/webdriver/http_response.cc',
         'test/webdriver/http_response.h',
         'test/webdriver/keycode_text_conversion.h',
         'test/webdriver/keycode_text_conversion_linux.cc',
         'test/webdriver/keycode_text_conversion_mac.mm',
         'test/webdriver/keycode_text_conversion_win.cc',
         'test/webdriver/webdriver_automation.cc',
         'test/webdriver/webdriver_automation.h',
         'test/webdriver/webdriver_basic_types.cc',
         'test/webdriver/webdriver_basic_types.h',
+        'test/webdriver/webdriver_capabilities_parser.cc',
+        'test/webdriver/webdriver_capabilities_parser.h',
         'test/webdriver/webdriver_dispatch.cc',
         'test/webdriver/webdriver_dispatch.h',
         'test/webdriver/webdriver_element_id.cc',
         'test/webdriver/webdriver_element_id.h',
         'test/webdriver/webdriver_error.cc',
         'test/webdriver/webdriver_error.h',
         'test/webdriver/webdriver_key_converter.cc',
         'test/webdriver/webdriver_key_converter.h',
         'test/webdriver/webdriver_logging.cc',
         'test/webdriver/webdriver_logging.h',
@@ skipping 81 matching lines @@
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         '../base/test/run_all_unittests.cc',
         'test/webdriver/commands/set_timeout_commands_unittest.cc',
         'test/webdriver/frame_path_unittest.cc',
         'test/webdriver/http_response_unittest.cc',
         'test/webdriver/keycode_text_conversion_unittest.cc',
+        'test/webdriver/webdriver_capabilities_parser_unittest.cc',
         'test/webdriver/webdriver_dispatch_unittest.cc',
         'test/webdriver/webdriver_key_converter_unittest.cc',
         'test/webdriver/webdriver_test_util.cc',
         'test/webdriver/webdriver_test_util.h',
         'test/webdriver/webdriver_util_unittest.cc',
       ],
       'conditions': [
         ['OS=="win"', {
           'conditions': [
             ['win_use_allocator_shim==1', {
@@ skipping 3058 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }