rlz: Hook up on mac, switch to chrome's network stack on win.

chrome/browser/rlz/rlz.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 CHROME_BROWSER_RLZ_RLZ_H_
 #define CHROME_BROWSER_RLZ_RLZ_H_
 #pragma once
 
 #include "build/build_config.h"
 
-#if defined(OS_WIN)
+#if defined(OS_WIN) || defined(OS_MACOSX)
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/singleton.h"
 #include "base/string16.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "rlz/lib/rlz_lib.h"
 
 // RLZ is a library which is used to measure distribution scenarios.
 // Its job is to record certain lifetime events in the registry and to send
 // them encoded as a compact string at most twice. The sent data does
 // not contain information that can be used to identify a user or to infer
 // browsing habits. The API in this file is a wrapper around the open source
 // RLZ library which can be found at http://code.google.com/p/rlz.
@@ skipping 90 matching lines @@
   // Tracker used for testing purposes only. If this value is non-NULL, it
   // will be returned from GetInstance() instead of the regular singleton.
   static RLZTracker* tracker_;
 
   // Configuation data for RLZ tracker. Set by call to Init().
   bool first_run_;
   bool send_ping_immediately_;
   bool google_default_search_;
   bool google_default_homepage_;
 
+  // Unique sequence token so that tasks posted by RLZTracker are executed
+  // sequentially in the blocking pool.
+  base::SequencedWorkerPool::SequenceToken worker_pool_token_;
+
   // Keeps track if the RLZ tracker has already performed its delayed
   // initialization.
   bool already_ran_;
 
   // Keeps a cache of RLZ access point strings, since they rarely change.
   // The cache must be protected by a lock since it may be accessed from
   // the UI thread for reading and the IO thread for reading and/or writing.
   base::Lock cache_lock_;
   std::map<rlz_lib::AccessPoint, string16> rlz_cache_;
 
   // Keeps track of whether the omnibox or host page have been used.
   bool omnibox_used_;
   bool homepage_used_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(RLZTracker);
 };
 
-#endif  // defined(OS_WIN)
+#endif  // defined(OS_WIN) || defined(OS_MACOSX)
 
 #endif  // CHROME_BROWSER_RLZ_RLZ_H_