Certificate Transparency: Wire the TreeStateTracker up.

chrome/browser/net/sth_distributor_provider.cc

+// 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.
+
+#include "chrome/browser/net/sth_distributor_provider.h"
+
+#include "base/lazy_instance.h"
+#include "net/cert/sth_distributor.h"
+
+namespace chrome_browser_net {
+
+namespace {
+base::LazyInstance<std::unique_ptr<net::ct::STHDistributor>>
+    global_sth_distributor = LAZY_INSTANCE_INITIALIZER;
+}  // namespace
+
+void SetGlobalSTHDistributor(
+    std::unique_ptr<net::ct::STHDistributor> distributor) {
+  global_sth_distributor.Get().swap(distributor);
+}
+
+net::ct::STHDistributor* GetGlobalSTHDistributor() {
+  CHECK(global_sth_distributor.Get() != nullptr);

[Ryan Sleevi, 2016/05/27 04:59:53]

Remove the != nullptr

(Plus, it'd be .Get().get() if you kept it, but you shouldn't)

[Eran Messeri, 2016/05/27 08:43:54]

Done.

+  return global_sth_distributor.Get().get();
+}
+
+}  // namespace chrome_browser_net