[chromedriver] Remove unnecessary round trips to Chrome.

chrome/test/chromedriver/command_executor_impl.cc

 // 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.
 
 #include "chrome/test/chromedriver/command_executor_impl.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/message_loop.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/stringprintf.h"
 #include "base/sys_info.h"
 #include "base/values.h"
+#include "chrome/test/chromedriver/alert_commands.h"
 #include "chrome/test/chromedriver/chrome/status.h"
 #include "chrome/test/chromedriver/chrome/version.h"
 #include "chrome/test/chromedriver/command_names.h"
 #include "chrome/test/chromedriver/commands.h"
 #include "chrome/test/chromedriver/element_commands.h"
 #include "chrome/test/chromedriver/net/url_request_context_getter.h"
 #include "chrome/test/chromedriver/session.h"
 #include "chrome/test/chromedriver/session_commands.h"
 #include "chrome/test/chromedriver/session_map.h"
 #include "chrome/test/chromedriver/window_commands.h"
@@ skipping 267 matching lines @@
         base::SysInfo::OperatingSystemName().c_str(),
         base::SysInfo::OperatingSystemVersion().c_str(),
         base::SysInfo::OperatingSystemArchitecture().c_str()));
     scoped_ptr<base::DictionaryValue> error(new base::DictionaryValue());
     error->SetString("message", status.message());
     value->reset(error.release());
   }
   if (!*value)
     value->reset(base::Value::CreateNullValue());
 }