Adding a simple class for dumping the contents of a cache. Use this new class in dump_cache.

net/tools/dump_cache/dump_files.h

+// 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.
+
+#ifndef NET_TOOLS_DUMP_CACHE_DUMP_FILES_H_
+#define NET_TOOLS_DUMP_CACHE_DUMP_FILE_H_
+
+// Performs basic inspection of the disk cache files with minimal disruption
+// to the actual files (they still may change if an error is detected on the
+// files).
+
+#include "base/file_path.h"
+
+// Returns the major version of the specified cache.
+int GetMajorVersion(const FilePath& input_path);
+
+// Dumps all entries from the cache.
+int DumpContents(const FilePath& input_path);
+
+// Dumps the headers of all files.
+int DumpHeaders(const FilePath& input_path);
+
+#endif  // NET_TOOLS_DUMP_CACHE_DUMP_FILES_H_