Added rendering benchmark javascript hook

content/renderer/rendering_benchmark_results.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 CONTENT_RENDERER_RENDERING_BENCHMARK_RESULTS_H_
+#define CONTENT_RENDERER_RENDERING_BENCHMARK_RESULTS_H_
+
+#include <string>
+
+#include "content/common/content_export.h"
+
+namespace content {
+class RenderingBenchmarkResults {
+ public:
+  virtual ~RenderingBenchmarkResults();
+
+  virtual void addResult(const std::string& benchmark_name,
+                         const std::string& result_name,
+                         const std::string& result_unit,
+                         double time) = 0;
+};
+}
+#endif  // CONTENT_RENDERER_RENDERING_BENCHMARK_RESULTS_H_