[Oilpan] [Reland] Migrate classes under core/fetch to Oilpan heap

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 803 matching lines @@
 {
     if (!m_customElementMicrotaskRunQueue)
         m_customElementMicrotaskRunQueue = CustomElementMicrotaskRunQueue::create();
     return m_customElementMicrotaskRunQueue.get();
 }
 
 void Document::setImportsController(HTMLImportsController* controller)
 {
     ASSERT(!m_importsController || !controller);
     m_importsController = controller;
-    if (!m_importsController && !loader())
+    if (!m_importsController && !loader() && m_fetcher)
         m_fetcher->clearContext();
 }
 
 HTMLImportLoader* Document::importLoader() const
 {
     if (!m_importsController)
         return 0;
     return m_importsController->loaderFor(*this);
 }
 
@@ skipping 1362 matching lines @@
 
     styleEngine().didDetach();
 
     frameHost()->eventHandlerRegistry().documentDetached(*this);
 
     // If this Document is associated with a live DocumentLoader, the
     // DocumentLoader will take care of clearing the FetchContext. Deferring
     // to the DocumentLoader when possible also prevents prematurely clearing
     // the context in the case where multiple Documents end up associated with
     // a single DocumentLoader (e.g., navigating to a javascript: url).
-    if (!loader())
+    if (!loader() && m_fetcher)
         m_fetcher->clearContext();
     // If this document is the master for an HTMLImportsController, sever that
     // relationship. This ensures that we don't leave import loads in flight,
     // thinking they should have access to a valid frame when they don't.
     if (m_importsController)
         HTMLImportsController::removeFrom(*this);
 
     // This is required, as our LocalFrame might delete itself as soon as it detaches
     // us. However, this violates Node::detach() semantics, as it's never
     // possible to re-attach. Eventually Document::detach() should be renamed,
     // or this setting of the frame to 0 could be made explicit in each of the
     // callers of Document::detach().
     m_frame = nullptr;
 
     if (m_mediaQueryMatcher)
         m_mediaQueryMatcher->documentDetached();
 
     DocumentLifecycleNotifier::notifyDocumentWasDetached();
     m_lifecycle.advanceTo(DocumentLifecycle::Stopped);
 
     // FIXME: Currently we call notifyContextDestroyed() only in
     // Document::detach(), which means that we don't call
     // notifyContextDestroyed() for a document that doesn't get detached.
     // If such a document has any observer, the observer won't get
     // a contextDestroyed() notification. This can happen for a document
     // created by DOMImplementation::createDocument().
     DocumentLifecycleNotifier::notifyContextDestroyed();
     ExecutionContext::notifyContextDestroyed();
+
+    m_fetcher.clear();
 }
 
 void Document::removeAllEventListeners()
 {
     ContainerNode::removeAllEventListeners();
 
     if (LocalDOMWindow* domWindow = this->domWindow())
         domWindow->removeAllEventListeners();
 }
 
@@ skipping 2382 matching lines @@
         InspectorInstrumentation::domContentLoadedEventFired(frame.get());
     }
 
     // Schedule dropping of the ElementDataCache. We keep it alive for a while after parsing finishes
     // so that dynamically inserted content can also benefit from sharing optimizations.
     // Note that we don't refresh the timer on cache access since that could lead to huge caches being kept
     // alive indefinitely by something innocuous like JS setting .innerHTML repeatedly on a timer.
     m_elementDataCacheClearTimer.startOneShot(10, FROM_HERE);
 
     // Parser should have picked up all preloads by now
-    m_fetcher->clearPreloads();
+    if (m_fetcher)
+        m_fetcher->clearPreloads();
 }
 
 void Document::elementDataCacheClearTimerFired(Timer<Document>*)
 {
     m_elementDataCache.clear();
 }
 
 Vector<IconURL> Document::iconURLs(int iconTypesMask)
 {
     IconURL firstFavicon;
@@ skipping 1121 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif