aura: A few changes to have aura_demo compile and run on linux.

aura/window.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 AURA_WINDOW_H_
 #define AURA_WINDOW_H_
 #pragma once
 
 #include <vector>
 
+#include "aura/aura_export.h"
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/gfx/compositor/layer_delegate.h"
 #include "ui/gfx/rect.h"
 
 class SkCanvas;
 
 namespace ui {
 class Compositor;
 class Layer;
 }
 
 namespace aura {
 
 class Desktop;
 class KeyEvent;
 class MouseEvent;
 class WindowDelegate;
 class WindowManager;
 
 namespace internal {
 class FocusManager;
 }
 
 // Aura window implementation. Interesting events are sent to the
 // WindowDelegate.
 // TODO(beng): resolve ownership.
-class Window : public ui::LayerDelegate {
+class AURA_EXPORT Window : public ui::LayerDelegate {
  public:
   enum Visibility {
     // Don't display the window onscreen and don't let it receive mouse
     // events. This is the default.
     VISIBILITY_HIDDEN = 1,
 
     // Display the window and let it receive mouse events.
     VISIBILITY_SHOWN = 2,
 
     // Display the window but prevent it from receiving mouse events.
@@ skipping 113 matching lines @@
   scoped_ptr<WindowManager> window_manager_;
 
   void* user_data_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace aura
 
 #endif  // AURA_WINDOW_H_