Workaround for a crashing appcache bug seen on the crash servers

webkit/appcache/appcache_service.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 WEBKIT_APPCACHE_APPCACHE_SERVICE_H_
 #define WEBKIT_APPCACHE_APPCACHE_SERVICE_H_
 
 #include <map>
 #include <set>
 
@@ skipping 81 matching lines @@
                            const net::CompletionCallback& callback);
 
   // Deletes all appcaches for the origin, 'callback' is invoked upon
   // completion. This method always completes asynchronously.
   // (virtual for unit testing)
   virtual void DeleteAppCachesForOrigin(
       const GURL& origin, const net::CompletionCallback& callback);
 
   // Checks the integrity of 'response_id' by reading the headers and data.
   // If it cannot be read, the cache group for 'manifest_url' is deleted.
-  void CheckAppCacheResponse(const GURL& manifest_url_, int64 cache_id,
+  void CheckAppCacheResponse(const GURL& manifest_url, int64 cache_id,
                              int64 response_id);
 
   // Context for use during cache updates, should only be accessed
   // on the IO thread. We do NOT add a reference to the request context,
   // it is the callers responsibility to ensure that the pointer
   // remains valid while set.
   net::URLRequestContext* request_context() const { return request_context_; }
   void set_request_context(net::URLRequestContext* context) {
     request_context_ = context;
   }
@@ skipping 39 matching lines @@
   // data (also session-only data).
   void set_save_session_state(bool save_session_state) {
     save_session_state_ = save_session_state;
   }
 
  protected:
   friend class AppCacheStorageImplTest;
   friend class AppCacheServiceTest;
 
   class AsyncHelper;
-  class NewAsyncHelper;
   class CanHandleOfflineHelper;
   class DeleteHelper;
   class DeleteOriginHelper;
   class GetInfoHelper;
   class CheckResponseHelper;
 
   typedef std::set<AsyncHelper*> PendingAsyncHelpers;
-  typedef std::set<NewAsyncHelper*> PendingNewAsyncHelpers;
   typedef std::map<int, AppCacheBackendImpl*> BackendMap;
 
   AppCachePolicy* appcache_policy_;
   AppCacheQuotaClient* quota_client_;
   scoped_ptr<AppCacheStorage> storage_;
   scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy_;
   scoped_refptr<quota::QuotaManagerProxy> quota_manager_proxy_;
   PendingAsyncHelpers pending_helpers_;
-  PendingNewAsyncHelpers pending_new_helpers_;
   BackendMap backends_;  // One 'backend' per child process.
   // Context for use during cache updates.
   net::URLRequestContext* request_context_;
   bool clear_local_state_on_exit_;
   // If true, nothing (not even session-only data) should be deleted on exit.
   bool save_session_state_;
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheService);
 };
 
 }  // namespace appcache
 
 #endif  // WEBKIT_APPCACHE_APPCACHE_SERVICE_H_