Added chrome switch that lets tests override URL path, moved GAIA auth extension from CrOS

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.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/browser/ui/webui/chromeos/login/signin_screen_handler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 635 matching lines @@
     localized_strings->SetString("stringPassword",
         l10n_util::GetStringUTF16(IDS_LOGIN_OFFLINE_PASSWORD));
     localized_strings->SetString("stringSignIn",
         l10n_util::GetStringUTF16(IDS_LOGIN_OFFLINE_SIGNIN));
     localized_strings->SetString("stringError",
         l10n_util::GetStringUTF16(IDS_LOGIN_OFFLINE_ERROR));
     params.Set("localizedStrings", localized_strings);
   }
 
   params.SetString("gaiaOrigin", GaiaUrls::GetInstance()->gaia_origin_url());
+  const CommandLine* command_line = CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kGaiaUrlPath)) {
+    params.SetString("gaiaUrlPath",
+                     command_line->GetSwitchValueASCII(switches::kGaiaUrlPath));
+  }
 
   // Test automation data:
-  const CommandLine* command_line = CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switches::kAuthExtensionPath)) {
     if (!test_user_.empty()) {
       params.SetString("test_email", test_user_);
       test_user_.clear();
     }
     if (!test_pass_.empty()) {
       params.SetString("test_password", test_pass_);
       test_pass_.clear();
     }
   }
@@ skipping 381 matching lines @@
       !dns_clear_task_running_ &&
       network_state_informer_->is_online()) {
     gaia_silent_load_ = true;
     gaia_silent_load_network_ =
         network_state_informer_->active_network_service_path();
     LoadAuthExtension(true, true, false);
   }
 }
 
 }  // namespace chromeos