A few minor changes to the chrome.downloads extension API

content/browser/download/download_item_impl.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.
 
 // File method ordering: Methods in this file are in the same order as
 // in download_item_impl.h, with the following exception: The public
 // interface Start is placed in chronological order with the other
 // (private) routines that together define a DownloadItem's state
 // transitions as the download progresses.  See "Download progression
 // cascade" later in this file.
@@ skipping 590 matching lines @@
 }
 
 const std::string& DownloadItemImpl::GetHashState() const {
   return hash_state_;
 }
 
 bool DownloadItemImpl::GetFileExternallyRemoved() const {
   return file_externally_removed_;
 }
 
+void DownloadItemImpl::DeleteFile() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  if ((GetState() != DownloadItem::COMPLETE) ||
+      file_externally_removed_) {
+    return;
+  }
+  BrowserThread::PostTaskAndReply(
+      BrowserThread::FILE, FROM_HERE,
+      base::Bind(&DeleteDownloadedFile, current_path_),
+      base::Bind(&DownloadItemImpl::OnDownloadedFileRemoved,
+                 weak_ptr_factory_.GetWeakPtr()));
+  current_path_.clear();
+}
+
 bool DownloadItemImpl::IsDangerous() const {
 #if defined(OS_WIN)
   // TODO(noelutz): At this point only the windows views UI supports
   // warnings based on dangerous content.
   return (danger_type_ == DOWNLOAD_DANGER_TYPE_DANGEROUS_FILE ||
           danger_type_ == DOWNLOAD_DANGER_TYPE_DANGEROUS_URL ||
           danger_type_ == DOWNLOAD_DANGER_TYPE_DANGEROUS_CONTENT ||
           danger_type_ == DOWNLOAD_DANGER_TYPE_UNCOMMON_CONTENT ||
           danger_type_ == DOWNLOAD_DANGER_TYPE_DANGEROUS_HOST ||
           danger_type_ == DOWNLOAD_DANGER_TYPE_POTENTIALLY_UNWANTED);
@@ skipping 1061 matching lines @@
     case RESUME_MODE_USER_CONTINUE:
       return "USER_CONTINUE";
     case RESUME_MODE_USER_RESTART:
       return "USER_RESTART";
   }
   NOTREACHED() << "Unknown resume mode " << mode;
   return "unknown";
 }
 
 }  // namespace content