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

chrome/browser/extensions/api/input_ime/input_ime_api_nonchromeos.cc

Index: chrome/browser/extensions/api/input_ime/input_ime_api_nonchromeos.cc
diff --git a/chrome/browser/extensions/api/input_ime/input_ime_api_nonchromeos.cc b/chrome/browser/extensions/api/input_ime/input_ime_api_nonchromeos.cc
index 8d8778b812a0e9407f50384fa36dda1f59a20514..29a9791edc1292dfd2726fef8b5bf77c0d28dad2 100644
--- a/chrome/browser/extensions/api/input_ime/input_ime_api_nonchromeos.cc
+++ b/chrome/browser/extensions/api/input_ime/input_ime_api_nonchromeos.cc
@@ -91,6 +91,17 @@ class ImeObserverNonChromeOS : public ui::ImeObserver {
         OnCompositionBoundsChanged::kEventName, std::move(args));
   }
 
+  void OnRequestEngineSwitch() override {
+    Browser* browser = chrome::FindLastActive();
+    if (!browser)
+      return;
+    extensions::InputImeEventRouter* router =
+        extensions::GetInputImeEventRouter(browser->profile());
+    if (!router)
+      return;
+    ui::IMEBridge::Get()->SetCurrentEngineHandler(router->active_engine());
+  }
+
  private:
   // ImeObserver overrides.
   void DispatchEventToExtension(