Introduce ui.dll / libui.so for the component build.

ui/base/clipboard/scoped_clipboard_writer.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.
 
 // This file declares the ScopedClipboardWriter class, a wrapper around
 // the Clipboard class which simplifies writing data to the system clipboard.
 // Upon deletion the class atomically writes all data to |clipboard_|,
 // avoiding any potential race condition with other processes that are also
 // writing to the system clipboard.
 
 #ifndef UI_BASE_CLIPBOARD_SCOPED_CLIPBOARD_WRITER_H_
 #define UI_BASE_CLIPBOARD_SCOPED_CLIPBOARD_WRITER_H_
 #pragma once
 
 #include <string>
 
 #include "base/string16.h"
 #include "ui/base/clipboard/clipboard.h"
+#include "ui/ui_api.h"
 
 class Pickle;
 
 namespace ui {
 
 // This class is a wrapper for |Clipboard| that handles packing data
 // into a Clipboard::ObjectMap.
 // NB: You should probably NOT be using this class if you include
 // webkit_glue.h. Use ScopedClipboardWriterGlue instead.
-class ScopedClipboardWriter {
+class UI_API ScopedClipboardWriter {
  public:
   // Create an instance that is a simple wrapper around clipboard.
   explicit ScopedClipboardWriter(Clipboard* clipboard);
 
   ~ScopedClipboardWriter();
 
   // Converts |text| to UTF-8 and adds it to the clipboard.
   void WriteText(const string16& text);
 
   // Converts the text of the URL to UTF-8 and adds it to the clipboard, then
@@ skipping 37 matching lines @@
   std::string url_text_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ScopedClipboardWriter);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_CLIPBOARD_SCOPED_CLIPBOARD_WRITER_H_