Upwards compatibility for Win8 SDK IDataObjectAsyncCapability/IAsyncOperation

ui/base/dragdrop/os_exchange_data_provider_win.h

 // Copyright (c) 2012 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>
 
+// Win8 SDK compatibility, see http://goo.gl/fufvl for more information.
+// "Note: This interface has been renamed IDataObjectAsyncCapability."
+// If we're building on pre-8 we define it to its old name. It's documented as
+// being binary compatible.
+#ifndef __IDataObjectAsyncCapability_FWD_DEFINED__
+#define IDataObjectAsyncCapability IAsyncOperation
+#define IID_IDataObjectAsyncCapability IID_IAsyncOperation
+#endif
+
 #include "base/win/scoped_comptr.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
 #include "ui/base/ui_export.h"
 
 namespace ui {
 
 class DataObjectImpl : public DownloadFileObserver,
                        public IDataObject,
-                       public IAsyncOperation {
+                       public IDataObjectAsyncCapability {
  public:
   class Observer {
    public:
     virtual void OnWaitForData() = 0;
     virtual void OnDataObjectDisposed() = 0;
    protected:
     virtual ~Observer() { }
   };
 
   DataObjectImpl();
@@ skipping 16 matching lines @@
       FORMATETC* format_etc, FORMATETC* result);
   HRESULT __stdcall SetData(
       FORMATETC* format_etc, STGMEDIUM* medium, BOOL should_release);
   HRESULT __stdcall EnumFormatEtc(
       DWORD direction, IEnumFORMATETC** enumerator);
   HRESULT __stdcall DAdvise(FORMATETC* format_etc, DWORD advf,
                             IAdviseSink* sink, DWORD* connection);
   HRESULT __stdcall DUnadvise(DWORD connection);
   HRESULT __stdcall EnumDAdvise(IEnumSTATDATA** enumerator);
 
-  // IAsyncOperation implementation:
+  // IDataObjectAsyncCapability implementation:
   HRESULT __stdcall EndOperation(
       HRESULT result, IBindCtx* reserved, DWORD effects);
   HRESULT __stdcall GetAsyncMode(BOOL* is_op_async);
   HRESULT __stdcall InOperation(BOOL* in_async_op);
   HRESULT __stdcall SetAsyncMode(BOOL do_op_async);
   HRESULT __stdcall StartOperation(IBindCtx* reserved);
 
   // IUnknown implementation:
   HRESULT __stdcall QueryInterface(const IID& iid, void** object);
   ULONG __stdcall AddRef();
@@ skipping 62 matching lines @@
  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);
-  static IAsyncOperation* GetIAsyncOperation(const OSExchangeData& data);
+  static IDataObjectAsyncCapability* GetIAsyncOperation(
+      const OSExchangeData& data);
 
   explicit OSExchangeDataProviderWin(IDataObject* source);
   OSExchangeDataProviderWin();
 
   virtual ~OSExchangeDataProviderWin();
 
   IDataObject* data_object() const { return data_.get(); }
-  IAsyncOperation* async_operation() const { return data_.get(); }
+  IDataObjectAsyncCapability* async_operation() const { return data_.get(); }
 
   // OSExchangeData::Provider methods.
   virtual void SetString(const string16& data);
   virtual void SetURL(const GURL& url, const string16& title);
   virtual void SetFilename(const FilePath& path);
   virtual void SetFilenames(
       const std::vector<OSExchangeData::FileInfo>& filenames) {
     NOTREACHED();
   }
   virtual void SetPickledData(OSExchangeData::CustomFormat format,
@@ skipping 27 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_