If user profile doesn't contain language setting, default to his Google account settings.

chrome/test/base/testing_profile.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_TEST_BASE_TESTING_PROFILE_H_
 #define CHROME_TEST_BASE_TESTING_PROFILE_H_
 
 #include <string>
 
 #include "base/files/scoped_temp_dir.h"
@@ skipping 239 matching lines @@
   virtual void SetExitType(ExitType exit_type) OVERRIDE {}
   virtual ExitType GetLastSessionExitType() OVERRIDE;
 #if defined(OS_CHROMEOS)
   virtual void SetupChromeOSEnterpriseExtensionObserver() OVERRIDE {
   }
   virtual void InitChromeOSPreferences() OVERRIDE {
   }
   virtual void ChangeAppLocale(const std::string&,
                                AppLocaleChangedVia) OVERRIDE {
   }
+  virtual void MarkCreated() OVERRIDE {
+  }
   virtual void OnLogin() OVERRIDE {
   }
+  virtual void RespectLocalePreference() OVERRIDE {
+  }
+  virtual void SetGPlusProfileLocale(const std::string&) OVERRIDE {

[sky, 2013/08/23 16:02:56]

nit: style guide says always name parameters (257/258 is wrong too).

[Alexander Alekseev, 2013/09/06 19:52:08]

Done.

+  }
 #endif  // defined(OS_CHROMEOS)
 
   virtual PrefProxyConfigTracker* GetProxyConfigTracker() OVERRIDE;
 
   // Schedules a task on the history backend and runs a nested loop until the
   // task is processed.  This has the effect of blocking the caller until the
   // history service processes all pending requests.
   void BlockUntilHistoryProcessesPendingRequests();
 
   virtual chrome_browser_net::Predictor* GetNetworkPredictor() OVERRIDE;
@@ skipping 68 matching lines @@
   // scoped_ptr<>.
   content::MockResourceContext* resource_context_;
 
   scoped_ptr<policy::ProfilePolicyConnector> profile_policy_connector_;
 
   // Weak pointer to a delegate for indicating that a profile was created.
   Delegate* delegate_;
 };
 
 #endif  // CHROME_TEST_BASE_TESTING_PROFILE_H_