Makes sure that an input method doesn't reference to a destroyed object.

ui/base/ime/mock_input_method.cc

Index: ui/base/ime/mock_input_method.cc
diff --git a/ui/base/ime/mock_input_method.cc b/ui/base/ime/mock_input_method.cc
index aed83c2ba72ae349c443e91c81eaf7eb47c0d9a4..b577d90ca568e0aa1ccd4dd8c333a35b94465cb1 100644
--- a/ui/base/ime/mock_input_method.cc
+++ b/ui/base/ime/mock_input_method.cc
@@ -24,6 +24,12 @@ void MockInputMethod::SetFocusedTextInputClient(TextInputClient* client) {
     OnTextInputTypeChanged(client);
 }
 
+void MockInputMethod::DetachTextInputClient(TextInputClient* client) {
+  if (text_input_client_ == client) {

[Seigo Nonaka, 2013/09/04 10:19:21]

nit: no need braces for one liner.

[Yuki, 2013/09/04 14:01:52]

Done.

+    text_input_client_ = NULL;
+  }
+}
+
 TextInputClient* MockInputMethod::GetTextInputClient() const {
   return text_input_client_;
 }