**NOTFORLANDING** New link rel=prerender API

chrome/renderer/prerender/prerender_extra_data.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 CHROME_RENDERER_PRERENDER_PRERENDER_EXTRA_DATA_H_
+#define CHROME_RENDERER_PRERENDER_PRERENDER_EXTRA_DATA_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebPrerender.h"
+#include "ui/gfx/size.h"
+
+namespace prerender {
+
+class PrerenderExtraData : public WebKit::WebPrerender::ExtraData {
+ public:
+    PrerenderExtraData(int prerender_id,
+                       int render_view_route_id,
+                       const gfx::Size& size);
+    virtual ~PrerenderExtraData() { }
+
+    int prerender_id() const { return prerender_id_; }
+    int render_view_route_id() const { return render_view_route_id_; }
+    const gfx::Size& size() const { return size_; }
+
+    static const PrerenderExtraData& fromPrerender(
+        const WebKit::WebPrerender& prerender);
+
+ private:
+  int prerender_id_;
+  int render_view_route_id_;
+  gfx::Size size_;
+
+  DISALLOW_COPY_AND_ASSIGN(PrerenderExtraData);
+};
+
+}  // namespace prerender
+
+#endif  // CHROME_RENDERER_PRERENDER_PRERENDER_EXTRA_DATA_H_