Consolidate RecordBrowserStartupTime() into one location

base/process_info.h

+// 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.
+
+#ifndef BASE_PROCESS_INFO_H_
+#define BASE_PROCESS_INFO_H_
+#pragma once
+
+#include "base/base_export.h"
+#include "base/basictypes.h"
+#include "base/time.h"
+
+namespace base {
+
+// Vends information about the current process.
+class BASE_EXPORT CurrentProcessInfo {
+ public:
+  // Returns the time at which the process was launched or NULL if an error
+  // occurred retrieving the information.
+  static const Time* CreationTime();
+};
+
+}  // namespace base
+
+#endif  // BASE_PROCESS_INFO_H_