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

Source/core/dom/Node.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004-2011, 2014 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 322 matching lines @@
     // Uses an editing-specific concept of what a leaf node is, and should probably be moved
     // out of the Node class into an editing-specific source file.
     Node* previousLeafNode() const;
 
     bool isRootEditableElement() const;
     Element* rootEditableElement() const;
     Element* rootEditableElement(EditableType) const;
 
     // For <link> and <style> elements.
     virtual bool sheetLoaded() { return true; }
-    virtual void notifyLoadedSheetAndAllCriticalSubresources(bool /* error loading subresource */) { }
+    enum LoadedSheetErrorStatus {
+        NoErrorLoadingSubresource,
+        ErrorOccurredLoadingSubresource
+    };
+    virtual void notifyLoadedSheetAndAllCriticalSubresources(LoadedSheetErrorStatus) { }
     virtual void startLoadingDynamicSheet() { ASSERT_NOT_REACHED(); }
 
     bool hasName() const { ASSERT(!isTextNode()); return getFlag(HasNameOrIsEditingTextFlag); }
 
     bool isUserActionElement() const { return getFlag(IsUserActionElementFlag); }
     void setUserActionElement(bool flag) { setFlag(flag, IsUserActionElementFlag); }
 
     bool active() const { return isUserActionElement() && isUserActionElementActive(); }
     bool inActiveChain() const { return isUserActionElement() && isUserActionElementInActiveChain(); }
     bool hovered() const { return isUserActionElement() && isUserActionElementHovered(); }
@@ skipping 548 matching lines @@
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showNode(const blink::Node*);
 void showTree(const blink::Node*);
 void showNodePath(const blink::Node*);
 #endif
 
 #endif // Node_h