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

ui/views/test/event_generator_delegate_mac.mm

Index: ui/views/test/event_generator_delegate_mac.mm
diff --git a/ui/views/test/event_generator_delegate_mac.mm b/ui/views/test/event_generator_delegate_mac.mm
index 6fe8fb309295790fa19f5b1e3f175352e4fff0e2..925401e73e422ba15bedffbb6e8142a1dc2a4e54 100644
--- a/ui/views/test/event_generator_delegate_mac.mm
+++ b/ui/views/test/event_generator_delegate_mac.mm
@@ -265,7 +265,10 @@ class EventGeneratorDelegateMac : public ui::EventTarget,
   ui::EventProcessor* GetEventProcessor() override { return this; }
 
   // Overridden from ui::EventProcessor:
-  ui::EventTarget* GetRootTarget() override { return this; }
+  ui::EventTarget* GetRootForEvent(ui::Event* event) override { return this; }
+  ui::EventTargeter* GetDefaultEventTargeter() override {
+    return this->GetEventTargeter();
+  }
 
   // Overridden from ui::EventDispatcherDelegate (via ui::EventProcessor):
   bool CanDispatchToTarget(EventTarget* target) override { return true; }