Disable non Latin keyboard layout on Lock screen and Sign-in screen.

chrome/browser/chromeos/input_method/mock_input_method_manager.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_INPUT_METHOD_MOCK_INPUT_METHOD_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_MOCK_INPUT_METHOD_MANAGER_H_
 
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
 #include "chromeos/ime/fake_input_method_delegate.h"
 #include "chromeos/ime/input_method_manager.h"
@@ skipping 55 matching lines @@
   virtual bool SwitchToPreviousInputMethod(
       const ui::Accelerator& accelerator) OVERRIDE;
   virtual bool SwitchInputMethod(const ui::Accelerator& accelerator) OVERRIDE;
   virtual InputMethodDescriptor GetCurrentInputMethod() const OVERRIDE;
   virtual InputMethodPropertyList
       GetCurrentInputMethodProperties() const OVERRIDE;
   virtual XKeyboard* GetXKeyboard() OVERRIDE;
   virtual InputMethodUtil* GetInputMethodUtil() OVERRIDE;
   virtual ComponentExtensionIMEManager*
       GetComponentExtensionIMEManager() OVERRIDE;
-  virtual bool IsFullLatinKeyboard(const std::string& layout) const OVERRIDE;
+  virtual bool IsLoginKeyboard(const std::string& layout) const OVERRIDE;
 
   // Sets an input method ID which will be returned by GetCurrentInputMethod().
   void SetCurrentInputMethodId(const std::string& input_method_id) {
     current_input_method_id_ = input_method_id;
   }
 
   // Set values that will be provided to the InputMethodUtil.
   void set_application_locale(const std::string& value);
   void set_hardware_keyboard_layout(const std::string& value);
 
@@ skipping 13 matching lines @@
   // The active input method ids cache (actually default only)
   std::vector<std::string> active_input_method_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(MockInputMethodManager);
 };
 
 }  // namespace input_method
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_MOCK_INPUT_METHOD_MANAGER_H_