diff --git a/base/tracking_info.cc b/base/tracking_info.cc
new file mode 100644
index 0000000..0b091f8
--- /dev/null
+++ b/base/tracking_info.cc
@@ -0,0 +1,28 @@
+// 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.
+
+#include "base/tracking_info.h"
+
+#include <stddef.h>
+#include "base/tracked_objects.h"
+
+namespace base {
+
+TrackingInfo::TrackingInfo()
+    : birth_tally(NULL) {
+}
+
+TrackingInfo::TrackingInfo(
+    const tracked_objects::Location& posted_from,
+    base::TimeTicks delayed_run_time)
+    : birth_tally(
+          tracked_objects::ThreadData::TallyABirthIfActive(posted_from)),
+      time_posted(TimeTicks::Now()),
+      delayed_run_time(delayed_run_time) {
+}
+
+TrackingInfo::~TrackingInfo() {}
+
+}  // namespace base
+