Avoid fragmenting the heap too much while reconstructing the index.

net/disk_cache/simple/simple_index_file_win.cc

+// Copyright (c) 2013 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 "net/disk_cache/simple/simple_index_file.h"
+
+#include <string>
+
+#include "base/callback.h"
+#include "base/files/file_enumerator.h"
+#include "base/files/file_path.h"
+
+namespace disk_cache {
+
+// static
+bool SimpleIndexFile::TraverseCacheDirectory(
+    const std::string& cache_path,
+    const EntryFileCallback& entry_file_callback) {
+  const int kFileSuffixLength = sizeof("_0") - 1;
+  const base::FilePath::StringType file_pattern = FILE_PATH_LITERAL("*_[0-2]");
+  base::FileEnumerator enumerator(
+      base::FilePath(cache_path), false /* recursive */,
+      base::FileEnumerator::FILES, file_pattern);
+  for (base::FilePath file_path = enumerator.Next(); !file_path.empty();
+       file_path = enumerator.Next()) {
+    entry_file_callback.Run(file_path.value());
+  }
+  return true;
+}
+
+}  // namespace disk_cache