Add error dispatch events to SVGStyleElement

Source/core/svg/SVGStyleElement.cpp

Index: Source/core/svg/SVGStyleElement.cpp
diff --git a/Source/core/svg/SVGStyleElement.cpp b/Source/core/svg/SVGStyleElement.cpp
index b4d0e79feef421c9f28cf4e95de8bf1778169d55..9437fa768cbecd5bbc8619611dbbc4368e9a372a 100644
--- a/Source/core/svg/SVGStyleElement.cpp
+++ b/Source/core/svg/SVGStyleElement.cpp
@@ -33,6 +33,7 @@ inline SVGStyleElement::SVGStyleElement(Document& document, bool createdByParser
     : SVGElement(SVGNames::styleTag, document)
     , StyleElement(&document, createdByParser)
     , m_svgLoadEventTimer(this, &SVGElement::svgLoadEventTimerFired)
+    , m_svgErrorEventTimer(this, &SVGElement::svgErrorEventTimerFired)
 {
 }
 
@@ -109,8 +110,10 @@ void SVGStyleElement::parseAttribute(const QualifiedName& name, const AtomicStri
 
 void SVGStyleElement::finishParsingChildren()
 {
-    StyleElement::finishParsingChildren(this);
+    StyleElement::ProcessingResult result = StyleElement::finishParsingChildren(this);
     SVGElement::finishParsingChildren();
+    if (result == StyleElement::ProcessingFatalError)
+        SVGElement::sendSVGErrorEventIfPossibleAsynchronously();
 }
 
 Node::InsertionNotificationRequest SVGStyleElement::insertedInto(ContainerNode* insertionPoint)
@@ -122,7 +125,8 @@ Node::InsertionNotificationRequest SVGStyleElement::insertedInto(ContainerNode*
 
 void SVGStyleElement::didNotifySubtreeInsertionsToDocument()
 {
-    StyleElement::processStyleSheet(document(), this);
+    if (StyleElement::processStyleSheet(document(), this) == StyleElement::ProcessingFatalError)
+        SVGElement::sendSVGErrorEventIfPossibleAsynchronously();
 }
 
 void SVGStyleElement::removedFrom(ContainerNode* insertionPoint)
@@ -134,7 +138,8 @@ void SVGStyleElement::removedFrom(ContainerNode* insertionPoint)
 void SVGStyleElement::childrenChanged(const ChildrenChange& change)
 {
     SVGElement::childrenChanged(change);
-    StyleElement::childrenChanged(this);
+    if (StyleElement::childrenChanged(this) == StyleElement::ProcessingFatalError)
+        SVGElement::sendSVGErrorEventIfPossibleAsynchronously();
 }
 
 DEFINE_TRACE(SVGStyleElement)