Handle the case where IAttachmentExecute::Save() deletes a downloaded file.

content/browser/download/base_file.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 "base/bind.h"
 #include "base/file_util.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
@@ skipping 199 matching lines @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
 
   if (calculate_hash_)
     secure_hash_->Finish(sha256_hash_, kSha256HashLen);
 
   Close();
 }
 
 // OS_WIN, OS_MACOSX and OS_LINUX have specialized implementations.
 #if !defined(OS_WIN) && !defined(OS_MACOSX) && !defined(OS_LINUX)
-void BaseFile::AnnotateWithSourceInformation() {
+content::DownloadInterruptReason BaseFile::AnnotateWithSourceInformation() {
+  return content::DOWNLOAD_INTERRUPT_REASON_NONE;
 }
 #endif
 
 int64 BaseFile::CurrentSpeed() const {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   return CurrentSpeedAtTime(base::TimeTicks::Now());
 }
 
 bool BaseFile::GetHash(std::string* hash) {
   DCHECK(!detached_);
@@ skipping 125 matching lines @@
 content::DownloadInterruptReason BaseFile::LogInterruptReason(
     const char* operation,
     int os_error,
     content::DownloadInterruptReason reason) {
   bound_net_log_.AddEvent(
       net::NetLog::TYPE_DOWNLOAD_FILE_ERROR,
       base::Bind(&download_net_logs::FileInterruptedCallback, operation,
                  os_error, reason));
   return reason;
 }