Tracking filter mutation via SVGElementProxy

third_party/WebKit/Source/core/svg/SVGDocumentExtensions.cpp

Index: third_party/WebKit/Source/core/svg/SVGDocumentExtensions.cpp
diff --git a/third_party/WebKit/Source/core/svg/SVGDocumentExtensions.cpp b/third_party/WebKit/Source/core/svg/SVGDocumentExtensions.cpp
index 1e32b5af0aa4d5eee53792f1f7a28bcca7fcee17..fa1740a298a9ca71eef62d16f510d548eec224ad 100644
--- a/third_party/WebKit/Source/core/svg/SVGDocumentExtensions.cpp
+++ b/third_party/WebKit/Source/core/svg/SVGDocumentExtensions.cpp
@@ -23,7 +23,7 @@
 
 #include "core/dom/Document.h"
 #include "core/inspector/ConsoleMessage.h"
-#include "core/layout/svg/SVGResourcesCache.h"
+#include "core/svg/SVGElementProxy.h"
 #include "core/svg/SVGSVGElement.h"
 #include "core/svg/animation/SMILTimeContainer.h"
 #include "wtf/AutoReset.h"
@@ -151,6 +151,21 @@ void SVGDocumentExtensions::reportError(const String& message) {
   m_document->addConsoleMessage(consoleMessage);
 }
 
+void SVGDocumentExtensions::attachPendingProxy(SVGElementProxy& elementProxy) {
+  DCHECK(!elementProxy.id().isEmpty());
+  auto result = m_pendingProxies.add(elementProxy.id(), nullptr);
+  if (result.isNewEntry)
+    result.storedValue->value = new SVGElementProxySet;
+  result.storedValue->value->add(elementProxy);
+}
+
+void SVGDocumentExtensions::invalidatePendingProxies(const AtomicString& id) {
+  if (id.isEmpty())
+    return;
+  if (auto pendingProxies = m_pendingProxies.take(id))
+    pendingProxies->invalidateProxies();
+}
+
 void SVGDocumentExtensions::addPendingResource(const AtomicString& id,
                                                Element* element) {
   ASSERT(element);
@@ -360,6 +375,7 @@ DEFINE_TRACE(SVGDocumentExtensions) {
   visitor->trace(m_timeContainers);
   visitor->trace(m_webAnimationsPendingSVGElements);
   visitor->trace(m_relativeLengthSVGRoots);
+  visitor->trace(m_pendingProxies);
   visitor->trace(m_pendingResources);
   visitor->trace(m_pendingResourcesForRemoval);
 }