Implement a poor man's PostAfterStartupTask() function.

chrome/browser/after_startup_task_utils.h

Index: chrome/browser/after_startup_task_utils.h
diff --git a/chrome/browser/after_startup_task_utils.h b/chrome/browser/after_startup_task_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..53a55799cd77f4d001b53ac8a1d13e19527d2df8
--- /dev/null
+++ b/chrome/browser/after_startup_task_utils.h
@@ -0,0 +1,44 @@
+// Copyright 2015 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_AFTER_STARTUP_TASK_UTILS_H_
+#define CHROME_BROWSER_AFTER_STARTUP_TASK_UTILS_H_
+
+#include "base/basictypes.h"
+#include "base/bind.h"
+#include "base/gtest_prod_util.h"
+#include "base/memory/ref_counted.h"
+
+namespace base {
+class TaskRunner;
+}
+namespace tracked_objects {
+class Location;
+};
+
+class AfterStartupTaskUtils {
+ public:
+  // Observes startup and when complete runs tasks that have accrued.
+  static void StartMonitoringStartup();
+
+  // Used to augment the behavior of BrowserThread::PostAfterStartupTask
+  // for chrome. Tasks are queued until startup is complete.
+  // Note: see browser_thread.h
+  static void PostTask(const tracked_objects::Location& from_here,
+                       const scoped_refptr<base::TaskRunner>& task_runner,
+                       const base::Closure& task);
+
+ private:
+  friend class AfterStartupTaskTest;
+  FRIEND_TEST_ALL_PREFIXES(AfterStartupTaskTest, IsStartupComplete);
+  FRIEND_TEST_ALL_PREFIXES(AfterStartupTaskTest, PostTask);
+
+  static void UnsafeReset();
+  static bool IsBrowserStartupComplete();
+  static void SetBrowserStartupIsComplete();
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(AfterStartupTaskUtils);
+};
+
+#endif  // CHROME_BROWSER_AFTER_STARTUP_TASK_UTILS_H_