Avoid two targeting phases in aura client-lib and EventProcessor.

ui/views/widget/root_view.cc

Index: ui/views/widget/root_view.cc
diff --git a/ui/views/widget/root_view.cc b/ui/views/widget/root_view.cc
index d2455488a7870c1f7a8cf6b19bb97bc009ccb303..a9926a687c85156f522c08e1707e821f85c817e1 100644
--- a/ui/views/widget/root_view.cc
+++ b/ui/views/widget/root_view.cc
@@ -252,10 +252,14 @@ View* RootView::GetFocusTraversableParentView() {
 ////////////////////////////////////////////////////////////////////////////////
 // RootView, ui::EventProcessor overrides:
 
-ui::EventTarget* RootView::GetRootTarget() {
+ui::EventTarget* RootView::GetRootForEvent(ui::Event* event) {
   return this;
 }
 
+ui::EventTargeter* RootView::GetDefaultEventTargeter() {
+  return this->GetEventTargeter();
+}
+
 void RootView::OnEventProcessingStarted(ui::Event* event) {
   if (!event->IsGestureEvent())
     return;