Implement profiler log writing at shutdown

chrome/browser/task_profiler/auto_tracking.h

+// 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.
+
+#ifndef CHROME_BROWSER_TASK_PROFILER_AUTO_TRACKING_H_
+#define CHROME_BROWSER_TASK_PROFILER_AUTO_TRACKING_H_
+#pragma once
+
+#include "base/file_path.h"
+#include "base/tracked_objects.h"
+
+//------------------------------------------------------------------------------
+// Provide simple way to to start global tracking, and to tear down tracking
+// when done.  The design has evolved to *not* do any teardown (and just leak
+// all allocated data structures).  This class is currently used to ensure
+// that the profiler data is output during shutdown, if this feature has been
+// requested.
+
+namespace task_profiler {
+
+class AutoTracking {
+ public:
+  AutoTracking() {
+    tracked_objects::ThreadData::Initialize();
+  }
+
+  ~AutoTracking();
+
+  void set_output_file_path(const FilePath &path);
+
+ private:
+  FilePath output_file_path_;
+
+  DISALLOW_COPY_AND_ASSIGN(AutoTracking);
+};
+
+}  // namespace task_profiler
+
+#endif  // CHROME_BROWSER_TASK_PROFILER_AUTO_TRACKING_H_