Add 'error' parameter to 'window.onerror' handlers.

Source/core/dom/ErrorEvent.h

Index: Source/core/dom/ErrorEvent.h
diff --git a/Source/core/dom/ErrorEvent.h b/Source/core/dom/ErrorEvent.h
index a28dcbef2a1e81300849935046f502bf0a8e94db..124b502f197196aac9aa74ca13facd954dcc52c5 100644
--- a/Source/core/dom/ErrorEvent.h
+++ b/Source/core/dom/ErrorEvent.h
@@ -31,7 +31,10 @@
 #ifndef ErrorEvent_h
 #define ErrorEvent_h
 
+#include "bindings/v8/ScriptValue.h"
+#include "bindings/v8/SerializedScriptValue.h"
 #include "core/dom/Event.h"
+#include "wtf/RefPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
@@ -43,6 +46,7 @@ struct ErrorEventInit : public EventInit {
     String filename;
     unsigned lineno;
     unsigned colno;
+    ScriptValue error;

[adamk, 2013/07/30 17:55:41]

Is this doing anything other than satisfying the code generator?

 };
 
 class ErrorEvent : public Event {
@@ -59,6 +63,10 @@ public:
     {
         return adoptRef(new ErrorEvent(type, initializer));
     }
+    static PassRefPtr<ErrorEvent> createSanitizedError()
+    {
+        return adoptRef(new ErrorEvent("Script error.", String(), 0, 0));
+    }
     virtual ~ErrorEvent();
 
     const String& message() const { return m_message; }
@@ -66,6 +74,8 @@ public:
     unsigned lineno() const { return m_lineNumber; }
     unsigned colno() const { return m_columnNumber; }
 
+    void setSerializedError(PassRefPtr<SerializedScriptValue>) { }
+
     virtual const AtomicString& interfaceName() const;
 
 private:
@@ -73,6 +83,7 @@ private:
     ErrorEvent(const String& message, const String& fileName, unsigned lineNumber, unsigned columnNumber);
     ErrorEvent(const AtomicString&, const ErrorEventInit&);
 
+
     String m_message;
     String m_fileName;
     unsigned m_lineNumber;