Add browser test for initial languages.

chrome/browser/chromeos/customization_document.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_CUSTOMIZATION_DOCUMENT_H_
 #define CHROME_BROWSER_CHROMEOS_CUSTOMIZATION_DOCUMENT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 311 matching lines @@
   // If it matches number of tasks finished - customization is applied
   // successfully.
   size_t apply_tasks_success_;
 
   // Weak factory for callbacks.
   base::WeakPtrFactory<ServicesCustomizationDocument> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServicesCustomizationDocument);
 };
 
+// In tests we need to override initial locale.
+void SetEnforceInitialLocaleForTesting(const char* locale);
+
+// In tests we need to override initial keyboard.
+void SetEnforceInitialKeyboardForTesting(const char* keyboard);
+
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_CUSTOMIZATION_DOCUMENT_H_