Reland of "Tracking reference filter mutation via SVGElementProxy"

third_party/WebKit/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.
@@ skipping 1550 matching lines @@
   if (layoutViewItem().wasNotifiedOfSubtreeChange())
     return true;
   return false;
 }
 
 bool Document::needsFullLayoutTreeUpdate() const {
   if (!isActive() || !view())
     return false;
   if (!m_useElementsNeedingUpdate.isEmpty())
     return true;
-  if (!m_layerUpdateSVGFilterElements.isEmpty())
-    return true;
   if (needsStyleRecalc())
     return true;
   if (needsStyleInvalidation())
     return true;
   // FIXME: The childNeedsDistributionRecalc bit means either self or children,
   // we should fix that.
   if (childNeedsDistributionRecalc())
     return true;
   if (DocumentAnimations::needsAnimationTimingUpdate(*this))
     return true;
@@ skipping 372 matching lines @@
   clearNeedsReattachLayoutTree();
 
   StyleResolver& resolver = ensureStyleResolver();
 
   bool shouldRecordStats;
   TRACE_EVENT_CATEGORY_GROUP_ENABLED("blink,blink_style", &shouldRecordStats);
   styleEngine().setStatsEnabled(shouldRecordStats);
 
   if (Element* documentElement = this->documentElement()) {
     inheritHtmlAndBodyElementStyles(change);
-    dirtyElementsForLayerUpdate();
     if (documentElement->shouldCallRecalcStyle(change))
       documentElement->recalcStyle(change);
-    while (dirtyElementsForLayerUpdate())
-      documentElement->recalcStyle(NoChange);
   }
 
   view()->recalcOverflowAfterStyleChange();
 
   // Only retain the HashMap for the duration of StyleRecalc and
   // LayoutTreeConstruction.
   m_nonAttachedStyle.clear();
   clearChildNeedsStyleRecalc();
   clearChildNeedsReattachLayoutTree();
 
@@ skipping 257 matching lines @@
 
 void Document::setIsViewSource(bool isViewSource) {
   m_isViewSource = isViewSource;
   if (!m_isViewSource)
     return;
 
   setSecurityOrigin(SecurityOrigin::createUnique());
   didUpdateSecurityOrigin();
 }
 
-bool Document::dirtyElementsForLayerUpdate() {
-  if (m_layerUpdateSVGFilterElements.isEmpty())
-    return false;
-
-  for (Element* element : m_layerUpdateSVGFilterElements)
-    element->setNeedsStyleRecalc(LocalStyleChange,
-                                 StyleChangeReasonForTracing::create(
-                                     StyleChangeReason::SVGFilterLayerUpdate));
-  m_layerUpdateSVGFilterElements.clear();
-  return true;
-}
-
-void Document::scheduleSVGFilterLayerUpdateHack(Element& element) {
-  if (element.getStyleChangeType() == NeedsReattachStyleChange)
-    return;
-  element.setSVGFilterNeedsLayerUpdate();
-  m_layerUpdateSVGFilterElements.add(&element);
-  scheduleLayoutTreeUpdateIfNeeded();
-}
-
-void Document::unscheduleSVGFilterLayerUpdateHack(Element& element) {
-  element.clearSVGFilterNeedsLayerUpdate();
-  m_layerUpdateSVGFilterElements.remove(&element);
-}
-
 void Document::scheduleUseShadowTreeUpdate(SVGUseElement& element) {
   m_useElementsNeedingUpdate.add(&element);
   scheduleLayoutTreeUpdateIfNeeded();
 }
 
 void Document::unscheduleUseShadowTreeUpdate(SVGUseElement& element) {
   m_useElementsNeedingUpdate.remove(&element);
 }
 
 void Document::updateUseShadowTreesIfNeeded() {
@@ skipping 4116 matching lines @@
   visitor->trace(m_styleSheetList);
   visitor->trace(m_documentTiming);
   visitor->trace(m_mediaQueryMatcher);
   visitor->trace(m_scriptedAnimationController);
   visitor->trace(m_scriptedIdleTaskController);
   visitor->trace(m_textAutosizer);
   visitor->trace(m_registrationContext);
   visitor->trace(m_customElementMicrotaskRunQueue);
   visitor->trace(m_elementDataCache);
   visitor->trace(m_useElementsNeedingUpdate);
-  visitor->trace(m_layerUpdateSVGFilterElements);
   visitor->trace(m_timers);
   visitor->trace(m_templateDocument);
   visitor->trace(m_templateDocumentHost);
   visitor->trace(m_userActionElements);
   visitor->trace(m_svgExtensions);
   visitor->trace(m_timeline);
   visitor->trace(m_compositorPendingAnimations);
   visitor->trace(m_contextDocument);
   visitor->trace(m_canvasFontCache);
   visitor->trace(m_intersectionObserverController);
@@ skipping 49 matching lines @@
 }
 
 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().getString().utf8().data());
 }
 #endif