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

ui/events/test/test_event_processor.cc

Index: ui/events/test/test_event_processor.cc
diff --git a/ui/events/test/test_event_processor.cc b/ui/events/test/test_event_processor.cc
index f5fbf893c98e468abe5b0ead3159899c7c4b887c..dd83c4c630f89679d61bb6e8f1395b7b6d247a62 100644
--- a/ui/events/test/test_event_processor.cc
+++ b/ui/events/test/test_event_processor.cc
@@ -19,6 +19,10 @@ TestEventProcessor::TestEventProcessor()
 
 TestEventProcessor::~TestEventProcessor() {}
 
+EventTarget* TestEventProcessor::GetRoot() {
+  return root_.get();
+}
+
 void TestEventProcessor::SetRoot(std::unique_ptr<EventTarget> root) {
   root_ = std::move(root);
 }
@@ -33,10 +37,14 @@ bool TestEventProcessor::CanDispatchToTarget(EventTarget* target) {
   return true;
 }
 
-EventTarget* TestEventProcessor::GetRootTarget() {
+EventTarget* TestEventProcessor::GetRootForEvent(Event* event) {
   return root_.get();
 }
 
+EventTargeter* TestEventProcessor::GetDefaultEventTargeter() {
+  return root_->GetEventTargeter();
+}
+
 EventDispatchDetails TestEventProcessor::OnEventFromSource(Event* event) {
   return EventProcessor::OnEventFromSource(event);
 }