Updates the IME state when necessary when switching top-level windows.

ui/base/ime/input_method_win.h

 // Copyright (c) 2011 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_WIN_H_
 #define UI_BASE_IME_INPUT_METHOD_WIN_H_
 
 #include <windows.h>
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "ui/base/ime/input_method_base.h"
 #include "ui/base/ime/win/imm32_manager.h"
 
 namespace ui {
 
 // A common InputMethod implementation based on IMM32.
 class UI_BASE_IME_EXPORT InputMethodWin : public InputMethodBase {
  public:
   InputMethodWin(internal::InputMethodDelegate* delegate,
                  HWND toplevel_window_handle);
   ~InputMethodWin() override;
 
+  // Overridden from InputMethodBase:
+  void OnFocus() override;
+
   // Overridden from InputMethod:
   bool OnUntranslatedIMEMessage(const base::NativeEvent& event,
                                 NativeEventResult* result) override;
   void DispatchKeyEvent(ui::KeyEvent* event) override;
   void OnTextInputTypeChanged(const TextInputClient* client) override;
   void OnCaretBoundsChanged(const TextInputClient* client) override;
   void CancelComposition(const TextInputClient* client) override;
   void OnInputLocaleChanged() override;
   bool IsInputLocaleCJK() const override;
   bool IsCandidatePopupOpen() const override;
@@ skipping 45 matching lines @@
   // OnImeRequest (and its actual implementations as OnDocumentFeed,
   // OnReconvertString, and OnQueryCharPosition) are placed in this base class.
   LRESULT OnImeRequest(UINT message,
                        WPARAM wparam,
                        LPARAM lparam,
                        BOOL* handled);
   LRESULT OnDocumentFeed(RECONVERTSTRING* reconv);
   LRESULT OnReconvertString(RECONVERTSTRING* reconv);
   LRESULT OnQueryCharPosition(IMECHARPOSITION* char_positon);
 
+  void RefreshInputLanguage();
+
   // Returns true if the Win32 native window bound to |client| is considered
   // to be ready for receiving keyboard input.
   bool IsWindowFocused(const TextInputClient* client) const;
 
   void DispatchFabricatedKeyEvent(ui::KeyEvent* event);
 
   // Asks the client to confirm current composition text.
   void ConfirmCompositionText();
 
   // Enables or disables the IME according to the current text input type.
@@ skipping 35 matching lines @@
 
   // Used for making callbacks.
   base::WeakPtrFactory<InputMethodWin> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodWin);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_IME_INPUT_METHOD_WIN_H_