sync: more debugging for crash in ChromeSystemResources

chrome/browser/sync/notifier/chrome_system_resources.h

 // Copyright (c) 2010 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.
 //
 // Simple system resources class that uses the current message loop
 // for scheduling.  Assumes the current message loop is already
 // running.
 
 #ifndef CHROME_BROWSER_SYNC_NOTIFIER_CHROME_SYSTEM_RESOURCES_H_
 #define CHROME_BROWSER_SYNC_NOTIFIER_CHROME_SYSTEM_RESOURCES_H_
 #pragma once
 
 #include <set>
 #include <string>
 
+#include "base/message_loop.h"
 #include "base/non_thread_safe.h"
 #include "base/scoped_ptr.h"
 #include "base/task.h"
 #include "chrome/browser/sync/notifier/state_writer.h"
 #include "google/cacheinvalidation/invalidation-client.h"
 
 namespace sync_notifier {
 
 class ChromeSystemResources : public invalidation::SystemResources {
  public:
@@ skipping 25 matching lines @@
                           invalidation::StorageCallback* callback);
 
  private:
   NonThreadSafe non_thread_safe_;
   scoped_ptr<ScopedRunnableMethodFactory<ChromeSystemResources> >
       scoped_runnable_method_factory_;
   // Holds all posted tasks that have not yet been run.
   std::set<invalidation::Closure*> posted_tasks_;
   StateWriter* state_writer_;
 
+  // TODO(tim): Trying to debug bug crbug.com/64652.
+  const MessageLoop* created_on_loop_;
+
   // If the scheduler has been started, inserts |task| into
   // |posted_tasks_| and returns a Task* to post.  Otherwise,
   // immediately deletes |task| and returns NULL.
   Task* MakeTaskToPost(invalidation::Closure* task);
 
   // Runs the task, deletes it, and removes it from |posted_tasks_|.
   void RunPostedTask(invalidation::Closure* task);
 
   // Runs the given storage callback with "true" and deletes it.
   void RunAndDeleteStorageCallback(
       invalidation::StorageCallback* callback);
 };
 
 }  // namespace sync_notifier
 
 #endif  // CHROME_BROWSER_SYNC_NOTIFIER_CHROME_SYSTEM_RESOURCES_H_