Fire error events for a variety of script and style failures.

Source/core/html/HTMLStyleElement.cpp

Index: Source/core/html/HTMLStyleElement.cpp
diff --git a/Source/core/html/HTMLStyleElement.cpp b/Source/core/html/HTMLStyleElement.cpp
index 55434df8e545cae9d56ccba1edb8d19f5a580c37..c0f78337400a7496ea15cc7366efd531f0a689e5 100644
--- a/Source/core/html/HTMLStyleElement.cpp
+++ b/Source/core/html/HTMLStyleElement.cpp
@@ -77,8 +77,10 @@ void HTMLStyleElement::parseAttribute(const QualifiedName& name, const AtomicStr
 
 void HTMLStyleElement::finishParsingChildren()
 {
-    StyleElement::finishParsingChildren(this);
+    StyleElement::ProcessingResult result = StyleElement::finishParsingChildren(this);
     HTMLElement::finishParsingChildren();
+    if (result == StyleElement::ProcessingFatalError)
+        notifyLoadedSheetAndAllCriticalSubresources(true);
 }
 
 Node::InsertionNotificationRequest HTMLStyleElement::insertedInto(ContainerNode* insertionPoint)
@@ -96,13 +98,15 @@ void HTMLStyleElement::removedFrom(ContainerNode* insertionPoint)
 
 void HTMLStyleElement::didNotifySubtreeInsertionsToDocument()
 {
-    StyleElement::processStyleSheet(document(), this);
+    if (StyleElement::processStyleSheet(document(), this) == StyleElement::ProcessingFatalError)
+        notifyLoadedSheetAndAllCriticalSubresources(true);
 }
 
 void HTMLStyleElement::childrenChanged(const ChildrenChange& change)
 {
     HTMLElement::childrenChanged(change);
-    StyleElement::childrenChanged(this);
+    if (StyleElement::childrenChanged(this) == StyleElement::ProcessingFatalError)
+        notifyLoadedSheetAndAllCriticalSubresources(true);
 }
 
 const AtomicString& HTMLStyleElement::media() const