Oilpan: make XHR progress event throttling finalization safe.

Source/core/xmlhttprequest/XMLHttpRequest.cpp

 /*
  *  Copyright (C) 2004, 2006, 2008 Apple Inc. All rights reserved.
  *  Copyright (C) 2005-2007 Alexey Proskuryakov <ap@webkit.org>
  *  Copyright (C) 2007, 2008 Julien Chaffraix <jchaffraix@webkit.org>
  *  Copyright (C) 2008, 2011 Google Inc. All rights reserved.
  *  Copyright (C) 2012 Intel Corporation
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
@@ skipping 328 matching lines @@
     return xmlHttpRequest.release();
 }
 
 XMLHttpRequest::XMLHttpRequest(ExecutionContext* context, PassRefPtr<SecurityOrigin> securityOrigin)
     : ActiveDOMObject(context)
     , m_timeoutMilliseconds(0)
     , m_state(UNSENT)
     , m_lengthDownloadedToFile(0)
     , m_receivedLength(0)
     , m_exceptionCode(0)
-    , m_progressEventThrottle(this)
+    , m_progressEventThrottle(XMLHttpRequestProgressEventThrottle::create(this))
     , m_responseTypeCode(ResponseTypeDefault)
     , m_securityOrigin(securityOrigin)
     , m_eventDispatchRecursionLevel(0)
     , m_async(true)
     , m_includeCredentials(false)
     , m_parsedResponse(false)
     , m_error(false)
     , m_uploadEventsAllowed(true)
     , m_uploadComplete(false)
     , m_sameOriginRequest(true)
@@ skipping 306 matching lines @@
 
     if (m_async || (m_state <= OPENED || m_state == DONE)) {
         TRACE_EVENT1("devtools.timeline", "XHRReadyStateChange", "data", InspectorXhrReadyStateChangeEvent::data(executionContext(), this));
         XMLHttpRequestProgressEventThrottle::DeferredEventAction action = XMLHttpRequestProgressEventThrottle::Ignore;
         if (m_state == DONE) {
             if (m_error)
                 action = XMLHttpRequestProgressEventThrottle::Clear;
             else
                 action = XMLHttpRequestProgressEventThrottle::Flush;
         }
-        m_progressEventThrottle.dispatchReadyStateChangeEvent(Event::create(EventTypeNames::readystatechange), action);
+        m_progressEventThrottle->dispatchReadyStateChangeEvent(Event::create(EventTypeNames::readystatechange), action);
         TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", TRACE_EVENT_SCOPE_THREAD, "data", InspectorUpdateCountersEvent::data());
     }
 
     if (m_state == DONE && !m_error) {
         TRACE_EVENT1("devtools.timeline", "XHRLoad", "data", InspectorXhrLoadEvent::data(executionContext(), this));
         dispatchProgressEventFromSnapshot(EventTypeNames::load);
         dispatchProgressEventFromSnapshot(EventTypeNames::loadend);
         TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", TRACE_EVENT_SCOPE_THREAD, "data", InspectorUpdateCountersEvent::data());
     }
 }
@@ skipping 528 matching lines @@
 {
     m_requestHeaders.clear();
 }
 
 void XMLHttpRequest::dispatchProgressEvent(const AtomicString& type, long long receivedLength, long long expectedLength)
 {
     bool lengthComputable = expectedLength > 0 && receivedLength <= expectedLength;
     unsigned long long loaded = receivedLength >= 0 ? static_cast<unsigned long long>(receivedLength) : 0;
     unsigned long long total = lengthComputable ? static_cast<unsigned long long>(expectedLength) : 0;
 
-    m_progressEventThrottle.dispatchProgressEvent(type, lengthComputable, loaded, total);
+    m_progressEventThrottle->dispatchProgressEvent(type, lengthComputable, loaded, total);
 
     if (type == EventTypeNames::loadend)
         InspectorInstrumentation::didDispatchXHRLoadendEvent(executionContext(), this);
 }
 
 void XMLHttpRequest::dispatchProgressEventFromSnapshot(const AtomicString& type)
 {
     dispatchProgressEvent(type, m_receivedLength, m_response.expectedContentLength());
 }
 
@@ skipping 564 matching lines @@
     long long receivedLength = m_receivedLength;
 
     if (!internalAbort())
         return;
 
     handleRequestError(TimeoutError, EventTypeNames::timeout, receivedLength, expectedLength);
 }
 
 void XMLHttpRequest::suspend()
 {
-    m_progressEventThrottle.suspend();
+    m_progressEventThrottle->suspend();
 }
 
 void XMLHttpRequest::resume()
 {
-    m_progressEventThrottle.resume();
+    m_progressEventThrottle->resume();
 }
 
 void XMLHttpRequest::stop()
 {
     InspectorInstrumentation::didFailXHRLoading(executionContext(), this, this, m_method, m_url);
     internalAbort();
 }
 
 bool XMLHttpRequest::hasPendingActivity() const
 {
@@ skipping 36 matching lines @@
     visitor->trace(m_responseDocumentParser);
     visitor->trace(m_progressEventThrottle);
     visitor->trace(m_upload);
     visitor->trace(m_blobLoader);
     XMLHttpRequestEventTarget::trace(visitor);
     DocumentParserClient::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink