MacViews: Implement event monitoring for a specific window (Reland)

ui/aura/test/event_generator_delegate_aura.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/aura/test/event_generator_delegate_aura.h"
 
 #include "base/memory/singleton.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_tree_host.h"
@@ skipping 54 matching lines @@
 }
 
 EventGeneratorDelegateAura::EventGeneratorDelegateAura() {
 }
 
 EventGeneratorDelegateAura::~EventGeneratorDelegateAura() {
 }
 
 ui::EventTarget* EventGeneratorDelegateAura::GetTargetAt(
     const gfx::Point& location) {
+  // TODO(andresantoso): Add support for EventGenerator::targeting_application()
+  // if needed for Ash.
   return GetHostAt(location)->window();
 }
 
 ui::EventSource* EventGeneratorDelegateAura::GetEventSource(
     ui::EventTarget* target) {
   return static_cast<Window*>(target)->GetHost()->GetEventSource();
 }
 
 gfx::Point EventGeneratorDelegateAura::CenterOfTarget(
     const ui::EventTarget* target) const {
@@ skipping 34 matching lines @@
 
 void EventGeneratorDelegateAura::ConvertPointFromHost(
     const ui::EventTarget* hosted_target,
     gfx::Point* point) const {
   const Window* window = WindowFromTarget(hosted_target);
   window->GetHost()->ConvertPointFromHost(point);
 }
 
 }  // namespace test
 }  // namespace aura