linux desktop aura: Get tab dragging working.

ui/views/widget/desktop_root_window_host_linux.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 UI_VIEWS_WIDGET_DESKTOP_ROOT_WINDOW_HOST_LINUX_H_
 #define UI_VIEWS_WIDGET_DESKTOP_ROOT_WINDOW_HOST_LINUX_H_
 
 #include <X11/Xlib.h>
 
 // Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class.
@@ skipping 18 matching lines @@
 class ScreenPositionClient;
 }
 namespace shared {
 class CompoundEventFilter;
 class InputMethodEventFilter;
 }
 }
 
 namespace views {
 class DesktopCaptureClient;
+class X11DesktopWindowMoveClient;
 class X11WindowEventFilter;
 
 class VIEWS_EXPORT DesktopRootWindowHostLinux
     : public DesktopRootWindowHost,
       public aura::RootWindowHost,
       public aura::client::CursorClient,
       public views::internal::InputMethodDelegate,
       public MessageLoop::Dispatcher {
  public:
   DesktopRootWindowHostLinux(
@@ skipping 170 matching lines @@
 
   // The invisible cursor.
   ::Cursor invisible_cursor_;
 
   // Toplevel event filter which dispatches to other event filters.
   aura::shared::CompoundEventFilter* root_window_event_filter_;
 
   // An event filter that pre-handles all key events to send them to an IME.
   scoped_ptr<aura::shared::InputMethodEventFilter> input_method_filter_;
   scoped_ptr<X11WindowEventFilter> x11_window_event_filter_;
+  scoped_ptr<X11DesktopWindowMoveClient> x11_window_move_client_;
 
   // TODO(beng): Consider providing an interface to DesktopNativeWidgetAura
   //             instead of providing this route back to Widget.
   internal::NativeWidgetDelegate* native_widget_delegate_;
 
   DesktopNativeWidgetAura* desktop_native_widget_aura_;
 
   aura::RootWindowHostDelegate* root_window_host_delegate_;
   aura::Window* content_window_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopRootWindowHostLinux);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_ROOT_WINDOW_HOST_LINUX_H_