Gets component build to work with aura. As part of this I needed to

ui/aura_shell/shell.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 UI_AURA_SHELL_SHELL_H_
 #define UI_AURA_SHELL_SHELL_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/aura/desktop_delegate.h"
+#include "ui/aura_shell/aura_shell_export.h"
 
 namespace aura {
 class Window;
 }
 
 namespace aura_shell {
 
 // Shell is a singleton object that presents the Shell API and implements the
 // Desktop's delegate interface.
-class Shell : public aura::DesktopDelegate {
+class AURA_SHELL_EXPORT Shell : public aura::DesktopDelegate {
  public:
   // Upon creation, the Shell sets itself as the Desktop's delegate, which takes
   // ownership of the Shell.
   Shell();
   virtual ~Shell();
 
   void Init();
 
  private:
   aura::Window* GetContainer(int container_id);
   const aura::Window* GetContainer(int container_id) const;
 
   // Overridden from aura::DesktopDelegate:
   virtual void AddChildToDefaultParent(aura::Window* window) OVERRIDE;
   virtual aura::Window* GetTopmostWindowToActivate(
       aura::Window* ignore) const OVERRIDE;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace aura_shell
 
 #endif  // UI_AURA_SHELL_SHELL_H_