Implement profiler log writing at shutdown

chrome/browser/task_profiler/auto_tracking.cc

Index: chrome/browser/task_profiler/auto_tracking.cc
diff --git a/chrome/browser/task_profiler/auto_tracking.cc b/chrome/browser/task_profiler/auto_tracking.cc
new file mode 100644
index 0000000000000000000000000000000000000000..866f2603e27f5f3e07f0f954f1f9450ba8b331ad
--- /dev/null
+++ b/chrome/browser/task_profiler/auto_tracking.cc
@@ -0,0 +1,17 @@
+// Copyright (c) 2011 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/task_profiler/auto_tracking.h"
+#include "chrome/browser/task_profiler/task_profiler_data_serializer.h"
+
+namespace task_profiler {
+
+AutoTracking::~AutoTracking() {
+  if (!output_file_path_.empty()) {
+    TaskProfilerDataSerializer output;
+    output.WriteToFile(output_file_path_);
+  }
+}
+
+}  // namespace task_profiler