Files required by a service now listed in manifest.

content/public/common/content_descriptor_keys.h

+// Copyright 2017 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 CONTENT_PUBLIC_COMMON_CONTENT_DESCRIPTOR_KEYS_H_
+#define CONTENT_PUBLIC_COMMON_CONTENT_DESCRIPTOR_KEYS_H_
+
+namespace content {
+
+// This is a list of global descriptor keys to be used with the
+// base::FileDescriptorStore object (see base/file_descriptor_store.h)
+//
+// Note that these keys are also used in
+// content/public/app/mojo/content_renderer_manifest.json and should be kept in
+// sync.
+
+extern const char kV8NativesDataDescriptor[];
+extern const char kV8SnapshotDataDescriptor[];
+extern const char kV8Snapshot32DataDescriptor[];
+extern const char kV8Snapshot64DataDescriptor[];
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_COMMON_CONTENT_DESCRIPTOR_KEYS_H_