Allow XHR timeout attribute to be overridden after send(), per spec

Source/core/loader/WorkerThreadableLoader.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 43 matching lines @@
         WTF_MAKE_FAST_ALLOCATED;
     public:
         static void loadResourceSynchronously(WorkerGlobalScope&, const ResourceRequest&, ThreadableLoaderClient&, const ThreadableLoaderOptions&);
         static PassRefPtr<WorkerThreadableLoader> create(WorkerGlobalScope& workerGlobalScope, PassRefPtr<ThreadableLoaderClientWrapper> clientWrapper, PassOwnPtr<ThreadableLoaderClient> clientBridge, const ResourceRequest& request, const ThreadableLoaderOptions& options)
         {
             return adoptRef(new WorkerThreadableLoader(workerGlobalScope, clientWrapper, clientBridge, request, options));
         }
 
         virtual ~WorkerThreadableLoader();
 
+        virtual void overrideTimeout(unsigned long timeout) OVERRIDE;
+
         virtual void cancel() OVERRIDE;
 
         bool done() const { return m_workerClientWrapper->done(); }
 
     private:
         // Creates a loader on the main thread and bridges communication between
         // the main thread and the worker context's thread where WorkerThreadableLoader runs.
         //
         // Regarding the bridge and lifetimes of items used in callbacks, there are a few cases:
         //
         // all cases. All tasks posted from the worker context's thread are ok because
         //    the last task posted always is "mainThreadDestroy", so MainThreadBridge is
         //    around for all tasks that use it on the main thread.
         //
         // case 1. worker.terminate is called.
         //    In this case, no more tasks are posted from the worker object's thread to the worker
         //    context's thread -- WorkerGlobalScopeProxy implementation enforces this.
         //
         // case 2. xhr gets aborted and the worker context continues running.
         //    The ThreadableLoaderClientWrapper has the underlying client cleared, so no more calls
         //    go through it.  All tasks posted from the worker object's thread to the worker context's
         //    thread do "ThreadableLoaderClientWrapper::ref" (automatically inside of the cross thread copy
         //    done in createCallbackTask), so the ThreadableLoaderClientWrapper instance is there until all
         //    tasks are executed.
         class MainThreadBridge FINAL : public ThreadableLoaderClient {
         public:
             // All executed on the worker context's thread.
             MainThreadBridge(PassRefPtr<ThreadableLoaderClientWrapper>, PassOwnPtr<ThreadableLoaderClient>, WorkerLoaderProxy&, const ResourceRequest&, const ThreadableLoaderOptions&, const String& outgoingReferrer);
+            void overrideTimeout(unsigned long timeoutMilliseconds);
             void cancel();
             void destroy();
 
         private:
             // Executed on the worker context's thread.
             void clearClientWrapper();
 
             // All executed on the main thread.
             static void mainThreadDestroy(ExecutionContext*, MainThreadBridge*);
             virtual ~MainThreadBridge();
 
             static void mainThreadCreateLoader(ExecutionContext*, MainThreadBridge*, PassOwnPtr<CrossThreadResourceRequestData>, ThreadableLoaderOptions, const String& outgoingReferrer);
+            static void mainThreadOverrideTimeout(ExecutionContext*, MainThreadBridge*, unsigned long timeoutMilliseconds);
             static void mainThreadCancel(ExecutionContext*, MainThreadBridge*);
             virtual void didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent) OVERRIDE;
             virtual void didReceiveResponse(unsigned long identifier, const ResourceResponse&) OVERRIDE;
             virtual void didReceiveData(const char*, int dataLength) OVERRIDE;
             virtual void didDownloadData(int dataLength) OVERRIDE;
             virtual void didReceiveCachedMetadata(const char*, int dataLength) OVERRIDE;
             virtual void didFinishLoading(unsigned long identifier, double finishTime) OVERRIDE;
             virtual void didFail(const ResourceError&) OVERRIDE;
             virtual void didFailAccessControlCheck(const ResourceError&) OVERRIDE;
             virtual void didFailRedirectCheck() OVERRIDE;
@@ skipping 13 matching lines @@
         WorkerThreadableLoader(WorkerGlobalScope&, PassRefPtr<ThreadableLoaderClientWrapper>, PassOwnPtr<ThreadableLoaderClient>, const ResourceRequest&, const ThreadableLoaderOptions&);
 
         RefPtrWillBePersistent<WorkerGlobalScope> m_workerGlobalScope;
         RefPtr<ThreadableLoaderClientWrapper> m_workerClientWrapper;
         MainThreadBridge& m_bridge;
     };
 
 } // namespace WebCore
 
 #endif // WorkerThreadableLoader_h