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

ui/events/event_processor.cc

Index: ui/events/event_processor.cc
diff --git a/ui/events/event_processor.cc b/ui/events/event_processor.cc
index 61d2e72138a8dc51beb04f960b19197d715c750d..b01501024b6ecf44eba7c93b8c6b31969b4f4a18 100644
--- a/ui/events/event_processor.cc
+++ b/ui/events/event_processor.cc
@@ -26,8 +26,10 @@ EventDispatchDetails EventProcessor::OnEventFromSource(Event* event) {
   }
 
   OnEventProcessingStarted(event_to_dispatch);
-  EventTarget* target = NULL;
-  if (!event_to_dispatch->handled())
+  EventTarget* target = nullptr;
+  if (event->target())
+    target = event->target();
+  else if (!event_to_dispatch->handled())
     target = targeter->FindTargetForEvent(root, event_to_dispatch);

[sadrul, 2017/02/08 00:24:38]

We should move some code from above into here too. Something like this:

  EventTarget* target = event->target();
  if (!target) {
    EventTarget* root = GetRootTarget();
    EventTargeter* targeter = root->GetEventTargeter();
    target = targeter->FindTargetForEvent(root, event_to_dispatch);
  }

 
   EventDispatchDetails details;