Drag and drop between app list and launcher - First patch

ash/shell.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 ASH_SHELL_H_
 #define ASH_SHELL_H_
 
 #include <utility>
 #include <vector>
 
 #include "ash/ash_export.h"
 #include "ash/shelf/shelf_types.h"
 #include "ash/system/user/login_status.h"
 #include "ash/wm/system_modal_container_event_filter_delegate.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "ui/aura/client/activation_change_observer.h"
 #include "ui/base/events/event_target.h"
 #include "ui/gfx/insets.h"
 #include "ui/gfx/screen.h"
 #include "ui/gfx/size.h"
 #include "ui/views/corewm/cursor_manager.h"
 
 class CommandLine;
 
+namespace app_list {
+class ApplicationDragAndDropHost;
+}
 namespace aura {
 class EventFilter;
 class RootWindow;
 class Window;
 namespace client {
 class ActivationClient;
 class FocusClient;
 class UserActionClient;
 }
 }
@@ skipping 171 matching lines @@
 
   // Shows the context menu for the background and launcher at
   // |location_in_screen| (in screen coordinates).
   void ShowContextMenu(const gfx::Point& location_in_screen);
 
   // Toggles the app list. |window| specifies in which display the app
   // list should be shown. If this is NULL, the active root window
   // will be used.
   void ToggleAppList(aura::Window* anchor);
 
+  // If |drag_and_drop_host| is not NULL it will be called upon drag and drop
+  // operations outside the application list.
+  void SetDragAndDropHostOfCurrentAppList(
+      app_list::ApplicationDragAndDropHost* drag_and_drop_host);
+
   // Returns app list target visibility.
   bool GetAppListTargetVisibility() const;
 
   // Returns app list window or NULL if it is not visible.
   aura::Window* GetAppListWindow();
 
   // Returns true if a system-modal dialog window is currently open.
   bool IsSystemModalWindowOpen() const;
 
   // For testing only: set simulation that a modal window is open
@@ skipping 361 matching lines @@
 
   // For testing only: simulate that a modal window is open
   bool simulate_modal_window_open_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_