Implemented drop hander for the Home toolbar button that accepts (only) links

chrome/browser/ui/views/toolbar_view.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 CHROME_BROWSER_UI_VIEWS_TOOLBAR_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_VIEW_H_
 
 #include <set>
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/prefs/public/pref_member.h"
 #include "chrome/browser/command_observer.h"
 #include "chrome/browser/ui/toolbar/back_forward_menu_model.h"
 #include "chrome/browser/ui/views/location_bar/location_bar_view.h"
 #include "chrome/browser/ui/views/reload_button.h"
 #include "ui/base/accelerators/accelerator.h"
 #include "ui/base/animation/slide_animation.h"
 #include "ui/views/accessible_pane_view.h"
 #include "ui/views/controls/button/menu_button.h"
 #include "ui/views/controls/button/menu_button_listener.h"
 #include "ui/views/view.h"
 
 class BrowserActionsContainer;
 class Browser;
+class HomeImageButton;
 class WrenchMenu;
 class WrenchMenuModel;
 
 namespace views {
 class MenuListener;
 }
 
 // The Browser Window's toolbar.
 class ToolbarView : public views::AccessiblePaneView,
                     public views::MenuButtonListener,
@@ skipping 157 matching lines @@
 
   void OnShowHomeButtonChanged();
 
   // The model that contains the security level, text, icon to display...
   ToolbarModel* model_;
 
   // Controls
   views::ImageButton* back_;
   views::ImageButton* forward_;
   ReloadButton* reload_;
-  views::ImageButton* home_;
+  HomeImageButton* home_;
   LocationBarView* location_bar_;
   BrowserActionsContainer* browser_actions_;
   views::MenuButton* app_menu_;
   Browser* browser_;
 
   // Controls whether or not a home button should be shown on the toolbar.
   BooleanPrefMember show_home_button_;
 
   // A pref that counts how often the bubble has been shown.
   IntegerPrefMember sideload_wipeout_bubble_shown_;
 
   // The display mode used when laying out the toolbar.
   DisplayMode display_mode_;
 
   // Wrench model and menu.
   // Note that the menu should be destroyed before the model it uses, so the
   // menu should be listed later.
   scoped_ptr<WrenchMenuModel> wrench_menu_model_;
   scoped_ptr<WrenchMenu> wrench_menu_;
 
   // A list of listeners to call when the menu opens.
   ObserverList<views::MenuListener> menu_listeners_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ToolbarView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_VIEW_H_