Register a separate default ui::EventTarget for Aura (Ash) to ensure that it does not interfere wit…

ui/aura/root_window.cc

 // Copyright (c) 2012 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/root_window.h"
 
 #include <vector>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
@@ skipping 467 matching lines @@
   // If the layer is not animating, then we need to update the host size
   // immediately.
   if (!layer()->GetAnimator()->is_animating())
     OnHostResized(host_->GetBounds().size());
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // RootWindow, ui::EventTarget implementation:
 
 ui::EventTarget* RootWindow::GetParentTarget() {
-  return Env::GetInstance();
+  return client::GetEventClient(this) ?
+      client::GetEventClient(this)->GetToplevelEventTarget() :
+          Env::GetInstance();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // RootWindow, ui::CompositorDelegate implementation:
 
 void RootWindow::ScheduleDraw() {
   if (compositor_lock_) {
     draw_on_compositor_unlock_ = true;
   } else if (!defer_draw_scheduling_) {
     defer_draw_scheduling_ = true;
@@ skipping 572 matching lines @@
 void RootWindow::UnlockCompositor() {
   DCHECK(compositor_lock_);
   compositor_lock_ = NULL;
   if (draw_on_compositor_unlock_) {
     draw_on_compositor_unlock_ = false;
     ScheduleDraw();
   }
 }
 
 }  // namespace aura