linux_aura: Start implementing DesktopRootWindowHostLinux

ui/views/widget/x11_window_event_filter.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_X11_WINDOW_EVENT_FILTER_H_
 #define UI_VIEWS_WIDGET_X11_WINDOW_EVENT_FILTER_H_
 
 #include <X11/Xlib.h>
 // Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class.
 #undef RootWindow
@@ skipping 11 matching lines @@
 }
 
 namespace views {
 class NativeWidgetAura;
 
 // An EventFilter that sets properties on X11 windows.
 class VIEWS_EXPORT X11WindowEventFilter : public aura::EventFilter {
  public:
   explicit X11WindowEventFilter(
       aura::RootWindow* root_window,
-      aura::DesktopActivationClient* activation_client,
-      NativeWidgetAura* widget);
+      aura::DesktopActivationClient* activation_client);
   virtual ~X11WindowEventFilter();
 
   // Changes whether borders are shown on this |root_window|.
   void SetUseHostWindowBorders(bool use_os_border);
 
   // Overridden from EventFilter:
   virtual bool PreHandleKeyEvent(aura::Window* target,
                                  ui::KeyEvent* event) OVERRIDE;
   virtual bool PreHandleMouseEvent(aura::Window* target,
                                    ui::MouseEvent* event) OVERRIDE;
   virtual ui::TouchStatus PreHandleTouchEvent(
       aura::Window* target,
       ui::TouchEvent* event) OVERRIDE;
   virtual ui::EventResult PreHandleGestureEvent(
       aura::Window* target,
       ui::GestureEvent* event) OVERRIDE;
 
  private:
   // Dispatches a _NET_WM_MOVERESIZE message to the window manager to tell it
   // to act as if a border or titlebar drag occurred.
   bool DispatchHostWindowDragMovement(int hittest,
                                       const gfx::Point& screen_location);
 
-  NativeWidgetAura* widget_;
   aura::DesktopActivationClient* activation_client_;
 
   // The display and the native X window hosting the root window.
   Display* xdisplay_;
   ::Window xwindow_;
 
   // The native root window.
   ::Window x_root_window_;
 
   ui::X11AtomCache atom_cache_;
 
   // True if |xwindow_| is the current _NET_ACTIVE_WINDOW.
   bool is_active_;
 
   DISALLOW_COPY_AND_ASSIGN(X11WindowEventFilter);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_X11_WINDOW_EVENT_FILTER_H_