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

ui/base/dragdrop/os_exchange_data.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_BASE_DRAGDROP_OS_EXCHANGE_DATA_H_
 #define UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_H_
 #pragma once
 
 #include "build/build_config.h"
 
 #include <set>
 #include <string>
 
 #if defined(OS_WIN)
 #include <objidl.h>
 #elif !defined(OS_MACOSX)
 #include <gtk/gtk.h>
 #endif
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/memory/scoped_ptr.h"
+#include "ui/base/ui_base_api.h"
 #include "ui/base/dragdrop/download_file_interface.h"
 
 class GURL;
 class Pickle;
 
 namespace ui {
 
 ///////////////////////////////////////////////////////////////////////////////
 //
 // OSExchangeData
 //  An object that holds interchange data to be sent out to OS services like
 //  clipboard, drag and drop, etc. This object exposes an API that clients can
 //  use to specify raw data and its high level type. This object takes care of
 //  translating that into something the OS can understand.
 //
 ///////////////////////////////////////////////////////////////////////////////
 
 // NOTE: Support for html and file contents is required by TabContentViewWin.
 // TabContentsViewGtk uses a different class to handle drag support that does
 // not use OSExchangeData. As such, file contents and html support is only
 // compiled on windows.
-class OSExchangeData {
+class UI_BASE_API OSExchangeData {
  public:
   // CustomFormats are used for non-standard data types. For example, bookmark
   // nodes are written using a CustomFormat.
 #if defined(OS_WIN)
   typedef CLIPFORMAT CustomFormat;
 #elif !defined(OS_MACOSX)
   typedef GdkAtom CustomFormat;
 #endif
 
   // Enumeration of the known formats.
   enum Format {
     STRING         = 1 << 0,
     URL            = 1 << 1,
     FILE_NAME      = 1 << 2,
     PICKLED_DATA   = 1 << 3,
 #if defined(OS_WIN)
     FILE_CONTENTS  = 1 << 4,
     HTML           = 1 << 5,
 #endif
   };
 
   // Encapsulates the info about a file to be downloaded.
-  struct DownloadFileInfo {
+  struct UI_BASE_API DownloadFileInfo {
     DownloadFileInfo(const FilePath& filename,
                      DownloadFileProvider* downloader);
     ~DownloadFileInfo();
 
     FilePath filename;
     scoped_refptr<DownloadFileProvider> downloader;
   };
 
   // Provider defines the platform specific part of OSExchangeData that
   // interacts with the native system.
-  class Provider {
+  class UI_BASE_API Provider {
    public:
     Provider() {}
     virtual ~Provider() {}
 
     virtual void SetString(const string16& data) = 0;
     virtual void SetURL(const GURL& url, const string16& title) = 0;
     virtual void SetFilename(const FilePath& path) = 0;
     virtual void SetPickledData(CustomFormat format, const Pickle& data) = 0;
 
     virtual bool GetString(string16* data) const = 0;
@@ skipping 100 matching lines @@
 
   // Provides the actual data.
   scoped_ptr<Provider> provider_;
 
   DISALLOW_COPY_AND_ASSIGN(OSExchangeData);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_H_