Use per-frame task runner in XHR

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

Index: third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequestProgressEventThrottle.h
diff --git a/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequestProgressEventThrottle.h b/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequestProgressEventThrottle.h
index 23ceb9c58399646bf4226f08b0293d222b46676d..7732051b3d22767ce50876e8db1703423764deb1 100644
--- a/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequestProgressEventThrottle.h
+++ b/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequestProgressEventThrottle.h
@@ -50,10 +50,7 @@ class XMLHttpRequest;
 //   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 {
@@ -85,7 +82,7 @@ public:
     DECLARE_TRACE();
 
 private:
-    explicit XMLHttpRequestProgressEventThrottle(XMLHttpRequest*);
+    XMLHttpRequestProgressEventThrottle(XMLHttpRequest*, std::unique_ptr<WebTaskRunner>);
 
     // Dispatches a "progress" progress event and usually a readyStateChange
     // event as well.
@@ -112,6 +109,7 @@ private:
 
     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