[chromedriver] Accept loadAsync as a non-op chromeOption.

chrome/test/chromedriver/capabilities.h

 // 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.
 
 #ifndef CHROME_TEST_CHROMEDRIVER_CAPABILITIES_H_
 #define CHROME_TEST_CHROMEDRIVER_CAPABILITIES_H_
 
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace base {
 class DictionaryValue;
 }
 
+class Log;
 class Status;
 
 struct Capabilities {
   Capabilities();
   ~Capabilities();
 
   // Return true if android package is specified.
   bool IsAndroid() const;
 
-  Status Parse(const base::DictionaryValue& desired_caps);
+  Status Parse(const base::DictionaryValue& desired_caps, Log* log);
 
   // Whether the lifetime of the started Chrome browser process should be
   // bound to ChromeDriver's process. If true, Chrome will not quit if
   // ChromeDriver dies.
   bool detach;
 
   std::string android_package;
   std::string android_activity;
   std::string android_process;
   std::string android_device_serial;
   std::string android_args;
 
   std::string log_path;
   CommandLine command;
   scoped_ptr<base::DictionaryValue> prefs;
   scoped_ptr<base::DictionaryValue> local_state;
   std::vector<std::string> extensions;
   scoped_ptr<base::DictionaryValue> logging_prefs;
 };
 
 #endif  // CHROME_TEST_CHROMEDRIVER_CAPABILITIES_H_