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

ui/base/dragdrop/os_exchange_data_provider_win.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_PROVIDER_WIN_H_
 #define UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_WIN_H_
 #pragma once
 
 #include <objidl.h>
 #include <shlobj.h>
 #include <string>
 
 #include "base/win/scoped_comptr.h"
+#include "ui/ui_api.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
 
 namespace ui {
 
 class DataObjectImpl : public DownloadFileObserver,
                        public IDataObject,
                        public IAsyncOperation {
  public:
   class Observer {
    public:
@@ skipping 95 matching lines @@
   StoredData contents_;
 
   base::win::ScopedComPtr<IDataObject> source_object_;
 
   bool is_aborting_;
   bool in_async_mode_;
   bool async_operation_started_;
   Observer* observer_;
 };
 
-class OSExchangeDataProviderWin : public OSExchangeData::Provider {
+class UI_API OSExchangeDataProviderWin : public OSExchangeData::Provider {
  public:
   // Returns true if source has plain text that is a valid url.
   static bool HasPlainTextURL(IDataObject* source);
 
   // Returns true if source has plain text that is a valid URL and sets url to
   // that url.
   static bool GetPlainTextURL(IDataObject* source, GURL* url);
 
   static DataObjectImpl* GetDataObjectImpl(const OSExchangeData& data);
   static IDataObject* GetIDataObject(const OSExchangeData& data);
@@ skipping 37 matching lines @@
  private:
   scoped_refptr<DataObjectImpl> data_;
   base::win::ScopedComPtr<IDataObject> source_object_;
 
   DISALLOW_COPY_AND_ASSIGN(OSExchangeDataProviderWin);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_WIN_H_