Reland of "Tracking reference filter mutation via SVGElementProxy"

third_party/WebKit/Source/core/paint/PaintLayerFilterInfo.cpp

 /*
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights 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.
@@ skipping 12 matching lines @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #include "core/paint/PaintLayerFilterInfo.h"
 
 #include "core/paint/PaintLayer.h"
-#include "core/style/FilterOperations.h"
 #include "platform/graphics/filters/FilterEffect.h"
 
 namespace blink {
 
 PaintLayerFilterInfo::PaintLayerFilterInfo(PaintLayer* layer)
     : m_layer(layer) {}
 
 PaintLayerFilterInfo::~PaintLayerFilterInfo() {
   DCHECK(!m_layer);
 }
 
+TreeScope* PaintLayerFilterInfo::treeScope() {
+  DCHECK(m_layer);
+  Node* node = m_layer->layoutObject()->node();
+  return node ? &node->treeScope() : nullptr;
+}
+
+void PaintLayerFilterInfo::resourceContentChanged() {
+  DCHECK(m_layer);
+  m_layer->layoutObject()->setShouldDoFullPaintInvalidation();
+  invalidateFilterChain();
+}
+
+void PaintLayerFilterInfo::resourceElementChanged() {
+  DCHECK(m_layer);
+  m_layer->layoutObject()->setShouldDoFullPaintInvalidation();
+  invalidateFilterChain();
+}
+
 void PaintLayerFilterInfo::setLastEffect(FilterEffect* lastEffect) {
   m_lastEffect = lastEffect;
 }
 
-void PaintLayerFilterInfo::updateReferenceFilterClients(
-    const FilterOperations& operations) {
-  clearFilterReferences();
-  addFilterReferences(operations, m_layer->layoutObject()->document());
+FilterEffect* PaintLayerFilterInfo::lastEffect() const {
+  return m_lastEffect;
 }
 
-void PaintLayerFilterInfo::filterNeedsInvalidation() {
-  if (m_layer)
-    m_layer->filterNeedsPaintInvalidation();
+void PaintLayerFilterInfo::invalidateFilterChain() {
+  m_lastEffect = nullptr;
 }
 
 DEFINE_TRACE(PaintLayerFilterInfo) {
   visitor->trace(m_lastEffect);
   SVGResourceClient::trace(visitor);
 }
 
 }  // namespace blink