aura: Make sure the root-window retains the X events it was already listening for.

ui/views/widget/x11_desktop_handler.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_desktop_handler.h"
 
 #include "base/message_loop.h"
 #include "ui/aura/desktop/desktop_activation_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/focus_manager.h"
@@ skipping 56 matching lines @@
         int window;
         if (ui::GetIntProperty(x_root_window_, "_NET_ACTIVE_WINDOW", &window) &&
             window) {
           OnActiveWindowChanged(static_cast< ::Window>(window));
         }
       }
       break;
     }
   }
 
-  return false;
+  return true;
 }
 
 void X11DesktopHandler::OnWindowInitialized(aura::Window* window) {
 }
 
 void X11DesktopHandler::OnWillDestroyEnv() {
   g_handler = NULL;
   delete this;
 }
 
 // This code should live elsewhere and should only trigger if a non-RootWindow
 // has been selected.
 void X11DesktopHandler::OnActiveWindowChanged(::Window xid) {
   aura::RootWindow* root_window =
       aura::RootWindow::GetForAcceleratedWidget(xid);
   aura::Window* window = root_window ?
       views::DesktopNativeWidgetHelperAura::GetViewsWindowForRootWindow(
           root_window) : NULL;
 
   desktop_activation_client_->ActivateWindow(window);
 }
 
 }  // namespace views