Use per-frame task runner in XHR

third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequestProgressEventThrottle.h

 /*
  * Copyright (C) 2010 Julien Chaffraix <jchaffraix@webkit.org>
  * All right reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 32 matching lines @@
 //
 // readystatechange events also go through this class since ProgressEvents and
 // readystatechange events affect each other.
 //
 // In the comments for this class:
 // - "progress" event means an event named "progress"
 // - ProgressEvent means an event using the ProgressEvent interface defined in
 //   the spec.
 class XMLHttpRequestProgressEventThrottle final : public GarbageCollectedFinalized<XMLHttpRequestProgressEventThrottle>, public TimerBase {
 public:
-    static XMLHttpRequestProgressEventThrottle* create(XMLHttpRequest* eventTarget)
-    {
-        return new XMLHttpRequestProgressEventThrottle(eventTarget);
-    }
+    static XMLHttpRequestProgressEventThrottle* create(XMLHttpRequest* eventTarget);
     ~XMLHttpRequestProgressEventThrottle() override;
 
     enum DeferredEventAction {
         Ignore,
         Clear,
         Flush,
     };
 
     // Dispatches a ProgressEvent.
     //
@@ skipping 11 matching lines @@
     void dispatchReadyStateChangeEvent(Event*, DeferredEventAction);
 
     void suspend();
     void resume();
 
     // Need to promptly stop this timer when it is deemed finalizable.
     EAGERLY_FINALIZE();
     DECLARE_TRACE();
 
 private:
-    explicit XMLHttpRequestProgressEventThrottle(XMLHttpRequest*);
+    XMLHttpRequestProgressEventThrottle(XMLHttpRequest*, std::unique_ptr<WebTaskRunner>);
 
     // Dispatches a "progress" progress event and usually a readyStateChange
     // event as well.
     void dispatchProgressProgressEvent(Event*);
 
     // The main purpose of this class is to throttle the "progress"
     // ProgressEvent dispatching. This class represents such a deferred
     // "progress" ProgressEvent.
     class DeferredEvent {
     public:
         DeferredEvent();
         void set(bool lengthComputable, unsigned long long loaded, unsigned long long total);
         void clear();
         bool isSet() const { return m_isSet; }
         Event* take();
 
     private:
         unsigned long long m_loaded;
         unsigned long long m_total;
         bool m_lengthComputable;
 
         bool m_isSet;
     };
 
     void fired() override;
 
+    std::unique_ptr<WebTaskRunner> m_taskRunner;

[yhirano, 2016/08/25 04:28:25]

Please add some comments describing why this is needed.

[tzik, 2016/08/29 02:08:59]

Done.

     Member<XMLHttpRequest> m_target;
 
     // A slot for the deferred "progress" ProgressEvent. When multiple events
     // arrive, only the last one is stored and others are discarded.
     DeferredEvent m_deferred;
 
     // True if any "progress" progress event has been dispatched since
     // |m_target|'s readyState changed.
     bool m_hasDispatchedProgressProgressEvent;
 };
 
 } // namespace blink
 
 #endif // XMLHttpRequestProgressEventThrottle_h