Move mod_pagespeed metrics out of prerender.

chrome/browser/mod_pagespeed_metrics.h

Index: chrome/browser/mod_pagespeed_metrics.h
diff --git a/chrome/browser/mod_pagespeed_metrics.h b/chrome/browser/mod_pagespeed_metrics.h
new file mode 100644
index 0000000000000000000000000000000000000000..20501eca97c9ab7600ba7b552bc4968fdb05917f
--- /dev/null
+++ b/chrome/browser/mod_pagespeed_metrics.h
@@ -0,0 +1,22 @@
+// 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 CHROME_BROWSER_MOD_PAGESPEED_METRICS_H_

[sky, 2015/03/31 23:51:55]

In hopes of not dumping more in chrome/browser, how about putting this in a
subdirectory, chrome/browser/mod_pagespeed?

[davidben, 2015/04/08 21:07:46]

Done.

+#define CHROME_BROWSER_MOD_PAGESPEED_METRICS_H_
+
+#include "content/public/common/resource_type.h"
+
+class GURL;
+
+namespace net {
+class HttpResponseHeaders;
+}
+
+// Records metrics about mod_pagespeed headers.

[sky, 2015/03/31 23:51:55]

Can you point to where one would look for what mod_pagespeed headers are?

[davidben, 2015/04/08 21:07:46]

Done.

+void RecordModPagespeedMetrics(
+    const content::ResourceType resource_type,
+    const GURL& request_url,
+    const net::HttpResponseHeaders* response_headers);
+
+#endif  // CHROME_BROWSER_MOD_PAGESPEED_METRICS_H_