Revert 177209 - Enable the FocusController on DesktopAura too.

ui/views/widget/desktop_aura/desktop_focus_rules.cc

Index: ui/views/widget/desktop_aura/desktop_focus_rules.cc
===================================================================
--- ui/views/widget/desktop_aura/desktop_focus_rules.cc	(revision 177225)
+++ ui/views/widget/desktop_aura/desktop_focus_rules.cc	(working copy)
@@ -1,20 +0,0 @@
-// 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/desktop_focus_rules.h"
-
-#include "ui/aura/root_window.h"
-#include "ui/aura/window.h"
-
-namespace views {
-
-DesktopFocusRules::DesktopFocusRules() {}
-DesktopFocusRules::~DesktopFocusRules() {}
-
-bool DesktopFocusRules::SupportsChildActivation(aura::Window* window) const {
-  // In Desktop-Aura, only children of the RootWindow are activatable.
-  return window->GetRootWindow() == window;
-}
-
-}  // namespace views