linux_aura: Start implementing DesktopRootWindowHostLinux

ui/views/widget/x11_window_event_filter.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 "ui/views/widget/x11_window_event_filter.h"
 
 #include <X11/extensions/XInput.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
@@ skipping 41 matching lines @@
   "_NET_WM_MOVERESIZE",
   NULL
 };
 
 }  // namespace
 
 namespace views {
 
 X11WindowEventFilter::X11WindowEventFilter(
     aura::RootWindow* root_window,
-    aura::DesktopActivationClient* activation_client,
-    NativeWidgetAura* widget)
-    : widget_(widget),
-      activation_client_(activation_client),
+    aura::DesktopActivationClient* activation_client)
+    : activation_client_(activation_client),
       xdisplay_(base::MessagePumpAuraX11::GetDefaultXDisplay()),
       xwindow_(root_window->GetAcceleratedWidget()),
       x_root_window_(DefaultRootWindow(xdisplay_)),
       atom_cache_(xdisplay_, kAtomsToCache),
       is_active_(false) {
 }
 
 X11WindowEventFilter::~X11WindowEventFilter() {
 }
 
@@ skipping 103 matching lines @@
 
   XSendEvent(xdisplay_, x_root_window_, False,
              SubstructureRedirectMask | SubstructureNotifyMask,
              &event);
 
   return true;
 }
 
 }  // namespace views