New AppListView Scroll Behavior.

ui/views/controls/textfield/textfield_controller.h

Index: ui/views/controls/textfield/textfield_controller.h
diff --git a/ui/views/controls/textfield/textfield_controller.h b/ui/views/controls/textfield/textfield_controller.h
index f92e712c72a2a41fb3ecfaa53697a024785c5ca4..041abebadeb2763fc9171a21aa3fe5651f55f503 100644
--- a/ui/views/controls/textfield/textfield_controller.h
+++ b/ui/views/controls/textfield/textfield_controller.h
@@ -40,7 +40,8 @@ class VIEWS_EXPORT TextfieldController {
 
   // Called to get notified about mouse events in the edit.
   // Returns true if the message was handled and should not be processed
-  // further. Currently, only mouse down events are sent here.
+  // further. Currently, only mouse down events and mouse wheel events are sent
+  // here.
   virtual bool HandleMouseEvent(Textfield* sender,
                                 const ui::MouseEvent& mouse_event);