Trigger `window.onerror` only for exceptions thrown in the same world.

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 583f07fe1a4d475b31763e390402b9c1d7c7c7f9..34b8a42497e7a9e34fae45b45dbbb9760abc0980 100644
--- a/Source/core/dom/ErrorEvent.h
+++ b/Source/core/dom/ErrorEvent.h
@@ -31,7 +31,9 @@
 #ifndef ErrorEvent_h
 #define ErrorEvent_h
 
+#include "bindings/v8/DOMWrapperWorld.h"
 #include "core/dom/Event.h"
+#include "wtf/RefPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
@@ -51,17 +53,17 @@ 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, PassRefPtr<DOMWrapperWorld> world)
     {
-        return adoptRef(new ErrorEvent(message, fileName, lineNumber, columnNumber));
+        return adoptRef(new ErrorEvent(message, fileName, lineNumber, columnNumber, world));
     }
     static PassRefPtr<ErrorEvent> create(const AtomicString& type, const ErrorEventInit& initializer)
     {
         return adoptRef(new ErrorEvent(type, initializer));
     }
-    static PassRefPtr<ErrorEvent> createSanitizedError()
+    static PassRefPtr<ErrorEvent> createSanitizedError(PassRefPtr<DOMWrapperWorld> world)
     {
-        return adoptRef(new ErrorEvent("Script error.", String(), 0, 0));
+        return adoptRef(new ErrorEvent("Script error.", String(), 0, 0, world));
     }
     virtual ~ErrorEvent();
 
@@ -76,11 +78,13 @@ public:
 
     virtual const AtomicString& interfaceName() const;
 
+    PassRefPtr<DOMWrapperWorld> world() const { return m_world; }
+
     void setUnsanitizedMessage(const String&);
 
 private:
     ErrorEvent();
-    ErrorEvent(const String& message, const String& fileName, unsigned lineNumber, unsigned columnNumber);
+    ErrorEvent(const String& message, const String& fileName, unsigned lineNumber, unsigned columnNumber, PassRefPtr<DOMWrapperWorld>);
     ErrorEvent(const AtomicString&, const ErrorEventInit&);
 
     String m_unsanitizedMessage;
@@ -88,6 +92,8 @@ private:
     String m_fileName;
     unsigned m_lineNumber;
     unsigned m_columnNumber;
+
+    RefPtr<DOMWrapperWorld> m_world;
 };
 
 } // namespace WebCore