Fixing caps lock problems under ChromeOS where the tray does not properly follow the real caps lock…

chromeos/ime/fake_xkeyboard.h

 // Copyright 2014 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 CHROMEOS_IME_FAKE_XKEYBOARD_H_
 #define CHROMEOS_IME_FAKE_XKEYBOARD_H_
 
 #include "chromeos/ime/xkeyboard.h"
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "chromeos/chromeos_export.h"
 
 namespace chromeos {
 namespace input_method {
 
 class CHROMEOS_EXPORT FakeXKeyboard : public XKeyboard {
  public:
   FakeXKeyboard();
   virtual ~FakeXKeyboard() {}
 
+  virtual void AddObserver(Observer* observer) OVERRIDE;
+  virtual void RemoveObserver(Observer* observer) OVERRIDE;
   virtual bool SetCurrentKeyboardLayoutByName(const std::string& layout_name)
       OVERRIDE;
   virtual bool ReapplyCurrentKeyboardLayout() OVERRIDE;
   virtual void ReapplyCurrentModifierLockStatus() OVERRIDE;
   virtual void DisableNumLock() OVERRIDE;
   virtual void SetCapsLockEnabled(bool enable_caps_lock) OVERRIDE;
   virtual bool CapsLockIsEnabled() OVERRIDE;
   virtual bool IsISOLevel5ShiftAvailable() const OVERRIDE;
   virtual bool IsAltGrAvailable() const OVERRIDE;
   virtual bool SetAutoRepeatEnabled(bool enabled) OVERRIDE;
   virtual bool SetAutoRepeatRate(const AutoRepeatRate& rate) OVERRIDE;
 
   int set_current_keyboard_layout_by_name_count_;
   std::string last_layout_;
   bool caps_lock_is_enabled_;
   bool auto_repeat_is_enabled_;
   AutoRepeatRate last_auto_repeat_rate_;
   // TODO(yusukes): Add more variables for counting the numbers of the API calls
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FakeXKeyboard);
 };
 
 }  // namespace input_method
 }  // namespace chromeos
 
 #endif  // CHROMEOS_IME_FAKE_XKEYBOARD_H_