Implement a poor man's PostAfterStartupTask() function.

content/browser/appcache/appcache_update_job.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 CONTENT_BROWSER_APPCACHE_APPCACHE_UPDATE_JOB_H_
 #define CONTENT_BROWSER_APPCACHE_APPCACHE_UPDATE_JOB_H_
 
 #include <deque>
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
+#include "base/timer/timer.h"
 #include "content/browser/appcache/appcache.h"
 #include "content/browser/appcache/appcache_host.h"
 #include "content/browser/appcache/appcache_response.h"
 #include "content/browser/appcache/appcache_service_impl.h"
 #include "content/browser/appcache/appcache_storage.h"
 #include "content/common/appcache_interfaces.h"
 #include "content/common/content_export.h"
 #include "net/base/completion_callback.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request.h"
@@ skipping 127 matching lines @@
     scoped_refptr<net::IOBuffer> buffer_;
     scoped_ptr<net::URLRequest> request_;
     AppCacheEntry existing_entry_;
     scoped_refptr<net::HttpResponseHeaders> existing_response_headers_;
     std::string manifest_data_;
     ResultType result_;
     int redirect_response_code_;
     scoped_ptr<AppCacheResponseWriter> response_writer_;
   };  // class URLFetcher
 
+  void DelayableStart();
+
   AppCacheResponseWriter* CreateResponseWriter();
 
   // Methods for AppCacheStorage::Delegate.
   void OnResponseInfoLoaded(AppCacheResponseInfo* response_info,
                             int64 response_id) override;
   void OnGroupAndNewestCacheStored(AppCacheGroup* group,
                                    AppCache* newest_cache,
                                    bool success,
                                    bool would_exceed_quota) override;
   void OnGroupMadeObsolete(AppCacheGroup* group,
@@ skipping 154 matching lines @@
   // have to delete the duplicates upon successful update. These ids
   // are also in the stored_response_ids_ collection so we only schedule
   // these for deletion on success.
   // TODO(michaeln): Rework when we no longer fetches master entries directly.
   std::vector<int64> duplicate_response_ids_;
 
   // Whether we've stored the resulting group/cache yet.
   StoredState stored_state_;
 
   AppCacheStorage* storage_;
+  base::OneShotTimer<AppCacheUpdateJob> delayed_start_timer_;
+  base::WeakPtrFactory<AppCacheUpdateJob> weak_factory_;
 
   FRIEND_TEST_ALL_PREFIXES(content::AppCacheGroupTest, QueueUpdate);
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheUpdateJob);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_UPDATE_JOB_H_