Makes the InputMethodEngine can be switched per profile when the top-level browser window is switch…

chrome/browser/ui/input_method/input_method_engine_base.h

Index: chrome/browser/ui/input_method/input_method_engine_base.h
diff --git a/chrome/browser/ui/input_method/input_method_engine_base.h b/chrome/browser/ui/input_method/input_method_engine_base.h
index 8d7899a1e33938b871ee45ab3e2bb756e39d2634..9076c73e5c8017cbd06b59c388bf7b7150d9eaf8 100644
--- a/chrome/browser/ui/input_method/input_method_engine_base.h
+++ b/chrome/browser/ui/input_method/input_method_engine_base.h
@@ -104,6 +104,9 @@ class InputMethodEngineBase : virtual public ui::IMEEngineHandlerInterface {
                                           int anchor_pos,
                                           int offset_pos) = 0;
 
+    // Called when the engine's MaybeSwitchEngine is called.
+    virtual void OnRequestEngineSwitch() = 0;
+
 #if defined(OS_CHROMEOS)
 
     // Called when an InputContext's properties change while it is focused.
@@ -137,6 +140,7 @@ class InputMethodEngineBase : virtual public ui::IMEEngineHandlerInterface {
   void Enable(const std::string& component_id) override;
   void Disable() override;
   void Reset() override;
+  void MaybeSwitchEngine() override;
   void ProcessKeyEvent(const ui::KeyEvent& key_event,
                        KeyEventDoneCallback& callback) override;
   void SetSurroundingText(const std::string& text,