Set DragDropTracker's capture window's size to zero, otherwise, it gets

ash/drag_drop/drag_drop_tracker.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 "ash/drag_drop/drag_drop_tracker.h"
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/coordinate_conversion.h"
 #include "ui/aura/root_window.h"
 #include "ui/base/events/event.h"
 #include "ui/gfx/screen.h"
 
 namespace {
 
 // Creates a window for capturing drag events.
 aura::Window* CreateCaptureWindow(aura::RootWindow* root_window) {

[mazda, 2012/10/01 17:30:03]

Could you delete |root_window| argument?

[varunjain, 2012/10/01 18:41:09]

Done.

   aura::Window* window = new aura::Window(NULL);
   window->SetType(aura::client::WINDOW_TYPE_NORMAL);
   window->Init(ui::LAYER_NOT_DRAWN);
   window->SetParent(NULL);
-  window->SetBoundsInScreen(root_window->GetBoundsInScreen(),

[mazda, 2012/09/29 06:47:56]

Does dragging from the 2nd display to primary one work?
I'd like to make sure that the capture window can receive mouse events when
dragging starts in the 2nd root window.

[varunjain, 2012/10/01 02:59:06]

seems to be working fine.

-                            gfx::Screen::GetDisplayNearestWindow(root_window));
   window->Show();
   return window;
 }
 
 }  // namespace
 
 namespace ash {
 namespace internal {
 
 DragDropTracker::DragDropTracker(aura::RootWindow* root_window)

[mazda, 2012/10/01 17:30:03]

This one as well.

[varunjain, 2012/10/01 18:41:09]

Done.

     : capture_window_(CreateCaptureWindow(root_window)) {
   capture_window_->SetCapture();
 }
 
 DragDropTracker::~DragDropTracker()  {
   capture_window_->ReleaseCapture();
 }
 
 aura::Window* DragDropTracker::GetTarget(const ui::LocatedEvent& event) {
   DCHECK(capture_window_.get());
@@ skipping 22 matching lines @@
       ash::wm::GetRootWindowAt(location_in_screen),
       &target_root_location);
   return new ui::MouseEvent(event.type(),
                             target_location,
                             target_root_location,
                             event.flags());
 }
 
 }  // namespace internal
 }  // namespace ash