Remove void** from disk_cache interface.

net/disk_cache/disk_cache.cc

Index: net/disk_cache/disk_cache.cc
diff --git a/net/disk_cache/disk_cache.cc b/net/disk_cache/disk_cache.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c19c07ba8e4eaca40454ffd0c7b99870cd30feb1
--- /dev/null
+++ b/net/disk_cache/disk_cache.cc
@@ -0,0 +1,15 @@
+// Copyright (c) 2014 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/disk_cache.h"
+
+namespace disk_cache {
+
+Backend::EnumerationState::~EnumerationState() {}
+
+Backend::~Backend() {}
+
+Entry::~Entry() {}
+
+}  // namespace disk_cache