Refactors away method implementations in ui::EventTargeter

ash/wm/resize_handle_window_targeter.cc

Index: ash/wm/resize_handle_window_targeter.cc
diff --git a/ash/wm/resize_handle_window_targeter.cc b/ash/wm/resize_handle_window_targeter.cc
index 28bd0e2ebe5df68821c882592eee566a4b20a019..cea64f37295c18bf55a764d3b3f3de8a940eac78 100644
--- a/ash/wm/resize_handle_window_targeter.cc
+++ b/ash/wm/resize_handle_window_targeter.cc
@@ -88,7 +88,8 @@ bool ResizeHandleWindowTargeter::SubtreeShouldBeExploredForEvent(
     // receive the event.
     ui::EventTarget* parent = target->GetParentTarget();
     if (parent) {
-      ui::EventTargeter* targeter = parent->GetEventTargeter();
+      WindowTargeter* targeter =
+          static_cast<WindowTargeter*>(parent->GetEventTargeter());
       if (targeter)
         return targeter->SubtreeShouldBeExploredForEvent(target, event);
     }