[safe browsing] Delete temporary files on cancelled update.

chrome/browser/safe_browsing/safe_browsing_store_file.cc

Index: chrome/browser/safe_browsing/safe_browsing_store_file.cc
diff --git a/chrome/browser/safe_browsing/safe_browsing_store_file.cc b/chrome/browser/safe_browsing/safe_browsing_store_file.cc
index 01a5dc73395ced463b8b3be37e2c7e44a2d3c32c..b4ce3867555cd9bc49e2d18c45782d06b3de1661 100644
--- a/chrome/browser/safe_browsing/safe_browsing_store_file.cc
+++ b/chrome/browser/safe_browsing/safe_browsing_store_file.cc
@@ -1182,7 +1182,13 @@ bool SafeBrowsingStoreFile::FinishUpdate(
 }
 
 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) {