Fix Views Combobox and Tree View text input.

ui/views/ime/mock_input_method.cc

Index: ui/views/ime/mock_input_method.cc
diff --git a/ui/views/ime/mock_input_method.cc b/ui/views/ime/mock_input_method.cc
index e48af72b76cd3dcd590827da0b6acbc45c433998..6b391934001848df470fe3cc58b19bf2f622dc51 100644
--- a/ui/views/ime/mock_input_method.cc
+++ b/ui/views/ime/mock_input_method.cc
@@ -9,7 +9,6 @@
 #include "ui/base/events/event.h"
 #include "ui/base/ime/text_input_client.h"
 #include "ui/base/keycodes/keyboard_codes.h"
-#include "ui/views/widget/widget.h"
 
 namespace views {
 
@@ -47,10 +46,6 @@ void MockInputMethod::Init(Widget* widget) {
   InputMethodBase::Init(widget);
 }
 
-void MockInputMethod::OnFocus() {}
-
-void MockInputMethod::OnBlur() {}
-
 bool MockInputMethod::OnUntranslatedIMEMessage(
     const base::NativeEvent& event,
     NativeEventResult* result) {