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

ui/base/ime/input_method_win.h

Index: ui/base/ime/input_method_win.h
diff --git a/ui/base/ime/input_method_win.h b/ui/base/ime/input_method_win.h
index 9478ac205123bb6ac79e07053f47cd406fc140ea..1eab715f5ba77675ddcf6fb8ab5c26cab72f8686 100644
--- a/ui/base/ime/input_method_win.h
+++ b/ui/base/ime/input_method_win.h
@@ -23,6 +23,9 @@ class UI_BASE_IME_EXPORT InputMethodWin : public InputMethodBase {
                  HWND toplevel_window_handle);
   ~InputMethodWin() override;
 
+  // Overridden from InputMethodBase:
+  void OnFocus() override;
+
   // Overridden from InputMethod:
   bool OnUntranslatedIMEMessage(const base::NativeEvent& event,
                                 NativeEventResult* result) override;
@@ -88,6 +91,8 @@ class UI_BASE_IME_EXPORT InputMethodWin : public InputMethodBase {
   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;