views: Extract Widget observer into its own header file.

chrome/browser/ui/views/toolbar_view.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/toolbar_view.h"
 
 #include "base/i18n/number_formatting.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/command_updater.h"
@@ skipping 39 matching lines @@
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/theme_provider.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/image/canvas_image_source.h"
 #include "ui/views/controls/button/button_dropdown.h"
 #include "ui/views/controls/menu/menu_listener.h"
 #include "ui/views/focus/view_storage.h"
 #include "ui/views/widget/tooltip_manager.h"
+#include "ui/views/widget/widget.h"
 #include "ui/views/window/non_client_view.h"
 
 #if defined(OS_WIN)
 #include "chrome/browser/enumerate_modules_model_win.h"
 #include "chrome/browser/ui/views/critical_notification_bubble_view.h"
 #if !defined(USE_AURA)
 #include "chrome/browser/ui/views/app_menu_button_win.h"
 #endif
 #endif
 
@@ skipping 956 matching lines @@
   // LocationBarContainer is not a child of the ToolbarView.
   gfx::Point origin(bounds.origin());
   views::View::ConvertPointToView(this, location_bar_container_->parent(),
                                   &origin);
   gfx::Rect target_bounds(origin, bounds.size());
   if (location_bar_container_->GetTargetBounds() != target_bounds) {
     location_bar_container_->SetInToolbar(true);
     location_bar_container_->SetBoundsRect(target_bounds);
   }
 }