Handle _NET_ACTIVE_WINDOW or FocusIn & FocusOut, not both.

ui/views/widget/desktop_aura/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/desktop_aura/x11_desktop_handler.h"
 
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
 
 #include "base/message_loop/message_loop.h"
@@ skipping 116 matching lines @@
   OnActiveWindowChanged(window, NOT_ACTIVE);
 }
 
 bool X11DesktopHandler::IsActiveWindow(::Window window) const {
   return window == current_window_ && current_window_active_state_ == ACTIVE;
 }
 
 void X11DesktopHandler::ProcessXEvent(XEvent* event) {
   switch (event->type) {
     case FocusIn:
-      if (current_window_ != event->xfocus.window)
+      if (!wm_supports_active_window_ &&
+          current_window_ != event->xfocus.window)
         OnActiveWindowChanged(event->xfocus.window, ACTIVE);
       break;
     case FocusOut:
-      if (current_window_ == event->xfocus.window)
+      if (!wm_supports_active_window_ &&
+          current_window_ == event->xfocus.window)
         OnActiveWindowChanged(None, NOT_ACTIVE);
       break;
     default:
       NOTREACHED();
   }
 }
 
 bool X11DesktopHandler::CanDispatchEvent(const ui::PlatformEvent& event) {
   return event->type == CreateNotify || event->type == DestroyNotify ||
          (event->type == PropertyNotify &&
@@ skipping 79 matching lines @@
     ui::XMenuList::GetInstance()->MaybeUnregisterMenu(window);
   }
 
   if (event_type == DestroyNotify) {
     // Notify the XForeignWindowManager that |window| has been destroyed.
     ui::XForeignWindowManager::GetInstance()->OnWindowDestroyed(window);
   }
 }
 
 }  // namespace views