Store Origin Trials public key in browser prefs

chrome/browser/prefs/origin_trial_prefs.h

Index: chrome/browser/prefs/origin_trial_prefs.h
diff --git a/chrome/browser/prefs/origin_trial_prefs.h b/chrome/browser/prefs/origin_trial_prefs.h
new file mode 100644
index 0000000000000000000000000000000000000000..3e8baafb66664ec69616b04fbe3146031f13f3be
--- /dev/null
+++ b/chrome/browser/prefs/origin_trial_prefs.h
@@ -0,0 +1,15 @@
+// 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 CHROME_BROWSER_PREFS_ORIGIN_TRIAL_PREFS_H_
+#define CHROME_BROWSER_PREFS_ORIGIN_TRIAL_PREFS_H_
+
+class PrefRegistrySimple;
+
+class OriginTrialPrefs {
+ public:
+  static void RegisterPrefs(PrefRegistrySimple* registry);
+};
+
+#endif  // CHROME_BROWSER_PREFS_ORIGIN_TRIAL_PREFS_H_