Enable the FocusController on DesktopAura too.

ui/views/widget/desktop_aura/desktop_focus_rules.h

Index: ui/views/widget/desktop_aura/desktop_focus_rules.h
===================================================================
--- ui/views/widget/desktop_aura/desktop_focus_rules.h	(revision 0)
+++ ui/views/widget/desktop_aura/desktop_focus_rules.h	(revision 0)
@@ -0,0 +1,26 @@
+// 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_DESKTOP_FOCUS_RULES_H_
+#define UI_VIEWS_WIDGET_DESKTOP_FOCUS_RULES_H_
+
+#include "ui/views/corewm/base_focus_rules.h"
+
+namespace views {
+
+class DesktopFocusRules : public corewm::BaseFocusRules {
+ public:
+  DesktopFocusRules();
+  virtual ~DesktopFocusRules();
+
+ private:
+  // Overridden from corewm::BaseFocusRules:
+  virtual bool SupportsChildActivation(aura::Window* window) const OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(DesktopFocusRules);
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_WIDGET_DESKTOP_FOCUS_RULES_H_