Downloads: replace BrowserThread::FILE with task scheduler.

content/browser/download/base_file_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 "content/browser/download/base_file.h"
 
 #include <windows.h>
 #include <cguid.h>
 #include <objbase.h>
 #include <shellapi.h>
 
 #include "base/files/file.h"
 #include "base/files/file_util.h"
 #include "base/guid.h"
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_restrictions.h"
+#include "base/win/scoped_com_initializer.h"
 #include "content/browser/download/download_interrupt_reasons_impl.h"
 #include "content/browser/download/download_stats.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/log/net_log_event_type.h"
 
 namespace content {
 namespace {
 
 const int kAllSpecialShFileOperationCodes[] = {
   // Should be kept in sync with the case statement below.
@@ skipping 260 matching lines @@
 
 } // namespace
 
 // Renames a file using the SHFileOperation API to ensure that the target file
 // gets the correct default security descriptor in the new path.
 // Returns a network error, or net::OK for success.
 DownloadInterruptReason BaseFile::MoveFileAndAdjustPermissions(
     const base::FilePath& new_path) {
   base::ThreadRestrictions::AssertIOAllowed();
 
+  // TODO(siggi): This is pretty awkward, but at least better than forcing
+  //     all downloads to a single-threaded COM sequence runner.
+  base::win::ScopedCOMInitializer com_initializer;
+
   // The parameters to SHFileOperation must be terminated with 2 NULL chars.
   base::FilePath::StringType source = full_path_.value();
   base::FilePath::StringType target = new_path.value();
 
   source.append(1, L'\0');
   target.append(1, L'\0');
 
   SHFILEOPSTRUCT move_info = {0};
   move_info.wFunc = FO_MOVE;
   move_info.pFrom = source.c_str();
   move_info.pTo = target.c_str();
   move_info.fFlags = FOF_SILENT | FOF_NOCONFIRMATION | FOF_NOERRORUI |
       FOF_NOCONFIRMMKDIR | FOF_NOCOPYSECURITYATTRIBS;
 
   int result = SHFileOperation(&move_info);
   DownloadInterruptReason interrupt_reason = DOWNLOAD_INTERRUPT_REASON_NONE;
 
   if (result == 0 && move_info.fAnyOperationsAborted)
     interrupt_reason = DOWNLOAD_INTERRUPT_REASON_FILE_FAILED;
   else if (result != 0)
     interrupt_reason = MapShFileOperationCodes(result);
 
   if (interrupt_reason != DOWNLOAD_INTERRUPT_REASON_NONE)
     return LogInterruptReason("SHFileOperation", result, interrupt_reason);
   return interrupt_reason;
 }
 
 }  // namespace content