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

ui/aura/root_window.h

 // 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.
 
 #ifndef UI_AURA_ROOT_WINDOW_H_
 #define UI_AURA_ROOT_WINDOW_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 265 matching lines @@
   virtual FocusManager* GetFocusManager() OVERRIDE;
 
   // Overridden from aura::client::CaptureDelegate:
   virtual void UpdateCapture(Window* old_capture, Window* new_capture) OVERRIDE;
   virtual void SetNativeCapture() OVERRIDE;
   virtual void ReleaseNativeCapture() OVERRIDE;
 
   // Exposes RootWindowHost::QueryMouseLocation() for test purposes.
   gfx::Point QueryMouseLocationForTest() const;
 
+  void set_parent_event_target(ui::EventTarget* parent_event_target) {
+    parent_event_target_ = parent_event_target;
+  }
+
  private:
   friend class Window;
   friend class CompositorLock;
 
   // Called whenever the mouse moves, tracks the current |mouse_moved_handler_|,
   // sending exited and entered events as its value changes.
   void HandleMouseMoved(const ui::MouseEvent& event, Window* target);
 
   bool ProcessMouseEvent(Window* target, ui::MouseEvent* event);
   bool ProcessKeyEvent(Window* target, ui::KeyEvent* event);
@@ skipping 110 matching lines @@
   scoped_ptr<ui::MouseEvent> held_mouse_move_;
   // Used to schedule DispatchHeldMouseMove() when |mouse_move_hold_count_| goes
   // to 0.
   base::WeakPtrFactory<RootWindow> held_mouse_event_factory_;
 
   scoped_ptr<ui::ViewProp> prop_;
 
   CompositorLock* compositor_lock_;
   bool draw_on_compositor_unlock_;
 
+  // Set to parent EventTarget if any. If this is set to NULL, we default to
+  // EventTarget implemented by the Aura Environment.
+  ui::EventTarget* parent_event_target_;
+
   DISALLOW_COPY_AND_ASSIGN(RootWindow);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_H_