Vector-of-structs (instead of struct-of-vectors) in "savable resources" IPC.

content/renderer/web_frame_utils.h

+// Copyright 2015 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_RENDERER_WEB_FRAME_UTILS_H_
+#define CONTENT_RENDERER_WEB_FRAME_UTILS_H_
+
+namespace blink {
+class WebFrame;
+}
+
+namespace content {
+
+// Returns the routing ID of the RenderFrameImpl or RenderFrameProxy
+// associated with |web_frame|.
+int GetRoutingIdForFrameOrProxy(blink::WebFrame* web_frame);
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_WEB_FRAME_UTILS_H_