Completes crrev.com/23478020 and makes sure of detachment from IME.

ui/base/ime/input_method_tsf.cc

Index: ui/base/ime/input_method_tsf.cc
diff --git a/ui/base/ime/input_method_tsf.cc b/ui/base/ime/input_method_tsf.cc
index b9e6c7c7682c3b041f7d634a6cf1638cc3cfe916..527e6b10d820cdfcce9503563c10da0c378a2ea6 100644
--- a/ui/base/ime/input_method_tsf.cc
+++ b/ui/base/ime/input_method_tsf.cc
@@ -130,6 +130,11 @@ void InputMethodTSF::SetFocusedTextInputClient(TextInputClient* client) {
   InputMethodWin::SetFocusedTextInputClient(client);
 }
 
+void InputMethodTSF::DetachTextInputClient(TextInputClient* client) {
+  InputMethodWin::DetachTextInputClient(client);
+  ui::TSFBridge::GetInstance()->RemoveFocusedClient(client);
+}
+
 bool InputMethodTSF::IsCandidatePopupOpen() const {
   return tsf_event_observer_->IsCandidatePopupOpen();
 }