WIP: Eliminate event.target() usage from TrayEventFilter

ash/system/tray/tray_bubble_wrapper.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/system/tray/tray_bubble_wrapper.h"
 
 #include "ash/system/tray/tray_background_view.h"
 #include "ash/system/tray/tray_event_filter.h"
 #include "ash/wm/window_properties.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/views/bubble/tray_bubble_view.h"
 #include "ui/views/widget/widget.h"
 
+#include "base/debug/stack_trace.h"
+
 namespace ash {
 
 TrayBubbleWrapper::TrayBubbleWrapper(TrayBackgroundView* tray,
                                      views::TrayBubbleView* bubble_view)
     : tray_(tray),
       bubble_view_(bubble_view) {
   bubble_widget_ = views::BubbleDialogDelegateView::CreateBubble(bubble_view_);
   bubble_widget_->AddObserver(this);
 
+//  base::debug::StackTrace().Print();
+
   TrayBackgroundView::InitializeBubbleAnimations(bubble_widget_);
   tray_->UpdateBubbleViewArrow(bubble_view_);
   bubble_view_->InitializeAndShowBubble();
 
   tray->tray_event_filter()->AddWrapper(this);
 }
 
 TrayBubbleWrapper::~TrayBubbleWrapper() {
   tray_->tray_event_filter()->RemoveWrapper(this);
   if (bubble_widget_) {
@@ skipping 18 matching lines @@
   tray_->HideBubbleWithView(bubble_view_);  // May destroy |bubble_view_|
 }
 
 void TrayBubbleWrapper::OnWidgetBoundsChanged(views::Widget* widget,
                                               const gfx::Rect& new_bounds) {
   DCHECK_EQ(bubble_widget_, widget);
   tray_->BubbleResized(bubble_view_);
 }
 
 }  // namespace ash