Allow OSExchangeData::Provider to be overridden at run time.

ui/base/dragdrop/os_exchange_data_provider_win.cc

 // 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.
 
 #include "ui/base/dragdrop/os_exchange_data_provider_win.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 
 #include "base/files/file_path.h"
 #include "base/i18n/file_util_icu.h"
 #include "base/logging.h"
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/pickle.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/scoped_hglobal.h"
 #include "net/base/filename_util.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/base/clipboard/clipboard_util_win.h"
 #include "ui/base/dragdrop/file_info.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/strings/grit/ui_strings.h"
 #include "url/gurl.h"
@@ skipping 244 matching lines @@
 }
 
 OSExchangeDataProviderWin::OSExchangeDataProviderWin()
     : data_(new DataObjectImpl()),
       source_object_(data_.get()) {
 }
 
 OSExchangeDataProviderWin::~OSExchangeDataProviderWin() {
 }
 
-OSExchangeData::Provider* OSExchangeDataProviderWin::Clone() const {
-  return new OSExchangeDataProviderWin(data_object());
+std::unique_ptr<OSExchangeData::Provider>
+OSExchangeDataProviderWin::Clone() const {
+  return base::MakeUnique<OSExchangeDataProviderWin>(data_object());
 }
 
 void OSExchangeDataProviderWin::MarkOriginatedFromRenderer() {
   STGMEDIUM* storage = GetStorageForString(std::string());
   data_->contents_.push_back(new DataObjectImpl::StoredDataInfo(
       GetRendererTaintFormatType().ToFormatEtc(), storage));
 }
 
 bool OSExchangeDataProviderWin::DidOriginateFromRenderer() const {
   return HasCustomFormat(GetRendererTaintFormatType());
@@ skipping 767 matching lines @@
   wcsncpy_s(descriptor->fgd[0].cFileName, MAX_PATH, file_name.c_str(),
             std::min(file_name.size(), static_cast<size_t>(MAX_PATH - 1u)));
 
   STGMEDIUM* storage = new STGMEDIUM;
   storage->tymed = TYMED_HGLOBAL;
   storage->hGlobal = hdata;
   storage->pUnkForRelease = NULL;
   return storage;
 }
 
-///////////////////////////////////////////////////////////////////////////////
-// OSExchangeData, public:
-
-// static
-OSExchangeData::Provider* OSExchangeData::CreateProvider() {
-  return new OSExchangeDataProviderWin();
-}
-
 }  // namespace ui