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..1b91159b015ef84573b0d6e78645ed663e8b1752 100644
--- a/Source/core/svg/SVGStyleElement.cpp
+++ b/Source/core/svg/SVGStyleElement.cpp
@@ -25,10 +25,17 @@
 
 #include "core/MediaTypeNames.h"
 #include "core/css/CSSStyleSheet.h"
+#include "core/events/Event.h"
 #include "wtf/StdLibExtras.h"
 
 namespace blink {
 
+static SVGStyleEventSender& styleErrorEventSender()
+{
+    DEFINE_STATIC_LOCAL(SVGStyleEventSender, sharedErrorEventSender, (EventTypeNames::error));
+    return sharedErrorEventSender;
+}
+
 inline SVGStyleElement::SVGStyleElement(Document& document, bool createdByParser)
     : SVGElement(SVGNames::styleTag, document)
     , StyleElement(&document, createdByParser)
@@ -41,6 +48,8 @@ SVGStyleElement::~SVGStyleElement()
 #if !ENABLE(OILPAN)
     StyleElement::clearDocumentData(document(), this);
 #endif
+
+    styleErrorEventSender().cancelEvent(this);
 }
 
 PassRefPtrWillBeRawPtr<SVGStyleElement> SVGStyleElement::create(Document& document, bool createdByParser)
@@ -109,8 +118,10 @@ 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)
+        sendSVGErrorEventAsynchronously();
 }
 
 Node::InsertionNotificationRequest SVGStyleElement::insertedInto(ContainerNode* insertionPoint)
@@ -122,7 +133,8 @@ Node::InsertionNotificationRequest SVGStyleElement::insertedInto(ContainerNode*
 
 void SVGStyleElement::didNotifySubtreeInsertionsToDocument()
 {
-    StyleElement::processStyleSheet(document(), this);
+    if (StyleElement::processStyleSheet(document(), this) == StyleElement::ProcessingFatalError)
+        sendSVGErrorEventAsynchronously();
 }
 
 void SVGStyleElement::removedFrom(ContainerNode* insertionPoint)
@@ -134,7 +146,19 @@ void SVGStyleElement::removedFrom(ContainerNode* insertionPoint)
 void SVGStyleElement::childrenChanged(const ChildrenChange& change)
 {
     SVGElement::childrenChanged(change);
-    StyleElement::childrenChanged(this);
+    if (StyleElement::childrenChanged(this) == StyleElement::ProcessingFatalError)
+        sendSVGErrorEventAsynchronously();
+}
+
+void SVGStyleElement::sendSVGErrorEventAsynchronously()
+{
+    styleErrorEventSender().dispatchEventSoon(this);
+}
+
+void SVGStyleElement::dispatchPendingEvent(SVGStyleEventSender* eventSender)
+{
+    ASSERT_UNUSED(eventSender, eventSender == &styleErrorEventSender());
+    dispatchEvent(Event::create(EventTypeNames::error));
 }
 
 DEFINE_TRACE(SVGStyleElement)