views: Extract Widget observer into its own header file.

chrome/browser/ui/views/confirm_bubble_views.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 "chrome/browser/ui/views/confirm_bubble_views.h"
 
 #include "chrome/browser/ui/confirm_bubble.h"
 #include "chrome/browser/ui/confirm_bubble_model.h"
 #include "grit/theme_resources.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/image/image.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/controls/button/text_button.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/controls/link.h"
 #include "ui/views/layout/grid_layout.h"
 #include "ui/views/layout/layout_constants.h"
+#include "ui/views/widget/widget.h"
 
 namespace {
 
 // Maximum width for the message field. We will wrap the message text when its
 // width is wider than this.
 const int kMaxMessageWidth = 400;
 
 }  // namespace
 
 ConfirmBubbleViews::ConfirmBubbleViews(const gfx::Point& anchor_point,
@@ skipping 125 matching lines @@
 
 void ShowConfirmBubble(gfx::NativeView view,
                        const gfx::Point& origin,
                        ConfirmBubbleModel* model) {
   ConfirmBubbleViews* bubble = new ConfirmBubbleViews(origin, model);
   views::BubbleDelegateView::CreateBubble(bubble);
   bubble->Show();
 }
 
 }  // namespace chrome