cros: Simplify chromeos::input_method::XKeyboard interface.

chromeos/ime/fake_xkeyboard.h

Index: chromeos/ime/fake_xkeyboard.h
diff --git a/chromeos/ime/fake_xkeyboard.h b/chromeos/ime/fake_xkeyboard.h
index 91a9fb897bf01c9cbd4df0f3e341e4f05c09bec4..c25b39f93e496021f4e04d030d16f47d7d0b5ddb 100644
--- a/chromeos/ime/fake_xkeyboard.h
+++ b/chromeos/ime/fake_xkeyboard.h
@@ -24,23 +24,15 @@ class CHROMEOS_EXPORT FakeXKeyboard : public XKeyboard {
       OVERRIDE;
   virtual bool ReapplyCurrentKeyboardLayout() OVERRIDE;
   virtual void ReapplyCurrentModifierLockStatus() OVERRIDE;
-  virtual void SetLockedModifiers(ModifierLockStatus new_caps_lock_status,
-                                  ModifierLockStatus new_num_lock_status)
-      OVERRIDE;
-  virtual void SetNumLockEnabled(bool enable_num_lock) OVERRIDE;
+  virtual void DisableNumLock() OVERRIDE;
   virtual void SetCapsLockEnabled(bool enable_caps_lock) OVERRIDE;
-  virtual bool NumLockIsEnabled() OVERRIDE;
   virtual bool CapsLockIsEnabled() OVERRIDE;
-  virtual unsigned int GetNumLockMask() OVERRIDE;
-  virtual void GetLockedModifiers(bool* out_caps_lock_enabled,
-                                  bool* out_num_lock_enabled) 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 num_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