Implement InputMethodTSF

ui/base/ime/input_method_tsf.h

-// Copyright 2013 The Chromium Authors. All rights reserved.
+// Copyright (c) 2013 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 UI_BASE_IME_INPUT_METHOD_TSF_H_
 #define UI_BASE_IME_INPUT_METHOD_TSF_H_
 
 #include <windows.h>
 
 #include <string>
 
@@ skipping 20 matching lines @@
   // Overridden from InputMethodBase:
   virtual void OnWillChangeFocusedClient(TextInputClient* focused_before,
                                          TextInputClient* focused) OVERRIDE;
   virtual void OnDidChangeFocusedClient(TextInputClient* focused_before,
                                         TextInputClient* focused) OVERRIDE;
 
  private:
   // Asks the client to confirm current composition text.
   void ConfirmCompositionText();
 
+  // Returns true if the Win32 native window bound to |client| has Win32 input
+  // focus.
+  bool IsWindowFocused(const TextInputClient* client) const;
+
   DISALLOW_COPY_AND_ASSIGN(InputMethodTSF);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_IME_INPUT_METHOD_TSF_H_