Propogate loading behavior data from Blink to content/

third_party/WebKit/public/platform/WebExperimentData.h

+// Copyright 2016 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 WebExperimentData_h
+#define WebExperimentData_h
+
+namespace blink {
+
+// This enum tracks various experiments that live in blink. It is used to pass
+// data to the browser for metrics gathering, in combination with
+// page_load_metrics.
+enum WebExperimentData {
+    NoExperiment = 0,
+    DocumentWriteEvaluatorExperiment = 1 << 0,

[esprehn, 2016/04/04 15:25:31]

Having every feature we experiment with represented in a public enum doesn't
seem right.

+};
+
+} // namespace blink
+
+#endif // WebExperimentData_h