[safe browsing] Delete temporary files on cancelled update.

chrome/browser/safe_browsing/safe_browsing_store_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 "chrome/browser/safe_browsing/safe_browsing_store_file.h"
 
 #include "base/file_util.h"
 #include "base/files/scoped_file.h"
 #include "base/md5.h"
 #include "base/metrics/histogram.h"
@@ skipping 1164 matching lines @@
     return false;
   }
 
   DCHECK(!new_file_.get());
   DCHECK(!file_.get());
 
   return Close();
 }
 
 bool SafeBrowsingStoreFile::CancelUpdate() {
-  return Close();
+  bool ret = Close();
+
+  // Delete stale staging file.
+  const base::FilePath new_filename = TemporaryFileForFilename(filename_);
+  base::DeleteFile(new_filename, false);
+
+  return ret;
 }
 
 void SafeBrowsingStoreFile::SetAddChunk(int32 chunk_id) {
   add_chunks_cache_.insert(chunk_id);
 }
 
 bool SafeBrowsingStoreFile::CheckAddChunk(int32 chunk_id) {
   return add_chunks_cache_.count(chunk_id) > 0;
 }
 
@@ skipping 41 matching lines @@
   // With SQLite support gone, one way to get to this code is if the
   // existing file is a SQLite file.  Make sure the journal file is
   // also removed.
   const base::FilePath journal_filename(
       basename.value() + FILE_PATH_LITERAL("-journal"));
   if (base::PathExists(journal_filename))
     base::DeleteFile(journal_filename, false);
 
   return true;
 }