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 1e57e25c112a6c213e1811a677d8b9d6250aefd2..5a674a45c3d85fc6fa931671b791052cdbb4da80 100644
--- a/Source/core/dom/ErrorEvent.h
+++ b/Source/core/dom/ErrorEvent.h
@@ -31,8 +31,11 @@
 #ifndef ErrorEvent_h
 #define ErrorEvent_h
 
+#include "bindings/v8/ScriptValue.h"
+#include "bindings/v8/SerializedScriptValue.h"
 #include "core/dom/Event.h"
 #include "wtf/text/WTFString.h"
+#include "wtf/RefPtr.h"
 
 namespace WebCore {
 
@@ -43,6 +46,7 @@ struct ErrorEventInit : public EventInit {
     String filename;
     unsigned lineno;
     unsigned column;
+    ScriptValue error;
 };
 
 class ErrorEvent : public Event {
@@ -51,9 +55,9 @@ public:
     {
         return adoptRef(new ErrorEvent);
     }
-    static PassRefPtr<ErrorEvent> create(const String& message, const String& fileName, unsigned lineNumber, unsigned columnNumber)
+    static PassRefPtr<ErrorEvent> create(const String& message, const String& fileName, unsigned lineNumber, unsigned columnNumber, const ScriptValue& error)
     {
-        return adoptRef(new ErrorEvent(message, fileName, lineNumber, columnNumber));
+        return adoptRef(new ErrorEvent(message, fileName, lineNumber, columnNumber, error));
     }
     static PassRefPtr<ErrorEvent> create(const AtomicString& type, const ErrorEventInit& initializer)
     {
@@ -65,18 +69,23 @@ public:
     const String& filename() const { return m_fileName; }
     unsigned lineno() const { return m_lineNumber; }
     unsigned column() const { return m_columnNumber; }
+    const ScriptValue& error() const { return m_error; }

[abarth-chromium, 2013/07/25 18:24:08]

Doesn't this create a leak between isolated worlds?  We need to do something
like what we've done with CustomEvent here.

+    void setSerializedError(PassRefPtr<SerializedScriptValue> error) { m_serializedError = error; }
 
     virtual const AtomicString& interfaceName() const;
 
 private:
     ErrorEvent();
-    ErrorEvent(const String& message, const String& fileName, unsigned lineNumber, unsigned columnNumber);
+    ErrorEvent(const String& message, const String& fileName, unsigned lineNumber, unsigned columnNumber, const ScriptValue& error);
     ErrorEvent(const AtomicString&, const ErrorEventInit&);
 
     String m_message;
     String m_fileName;
     unsigned m_lineNumber;
     unsigned m_columnNumber;
+    ScriptValue m_error;
+
+    RefPtr<SerializedScriptValue> m_serializedError;
 };
 
 } // namespace WebCore