Fix aura linx build.

views/widget/native_widget_aura.h

 // Copyright (c) 2011 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 VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_
 #define VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_
 #pragma once
 
 #include "ui/aura/window_delegate.h"
+#include "views/views_export.h"
 #include "views/widget/native_widget_private.h"
 
 namespace aura {
 class Window;
 }
 namespace gfx {
 class Font;
 }
 
 namespace views {
 
-class NativeWidgetAura : public internal::NativeWidgetPrivate,
-                         public aura::WindowDelegate {
+class VIEWS_EXPORT NativeWidgetAura : public internal::NativeWidgetPrivate,
+                                      public aura::WindowDelegate {
  public:
   explicit NativeWidgetAura(internal::NativeWidgetDelegate* delegate);
   virtual ~NativeWidgetAura();
 
   // TODO(beng): Find a better place for this, and the similar method on
   //             NativeWidgetWin.
   static gfx::Font GetWindowTitleFont();
 
   // Overridden from internal::NativeWidgetPrivate:
   virtual void InitNativeWidget(const Widget::InitParams& params) OVERRIDE;
@@ skipping 105 matching lines @@
   // The following factory is used for calls to close the NativeWidgetAura
   // instance.
   ScopedRunnableMethodFactory<NativeWidgetAura> close_widget_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWidgetAura);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_