Don't ignore OOM exceptions.

Source/bindings/v8/V8AbstractEventListener.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 125 matching lines @@
         tryCatch.Reset();
 
         // Restore the old event. This must be done for all exit paths through this method.
         if (savedEvent.IsEmpty())
             V8HiddenValue::setHiddenValue(v8Context->GetIsolate(), v8Context->Global(), V8HiddenValue::event(isolate), v8::Undefined(v8Context->GetIsolate()));
         else
             V8HiddenValue::setHiddenValue(v8Context->GetIsolate(), v8Context->Global(), V8HiddenValue::event(isolate), savedEvent);
         tryCatch.Reset();
     }
 
-    ASSERT(!handleOutOfMemory() || returnValue.IsEmpty());
-
     if (returnValue.IsEmpty())
         return;
 
     if (m_isAttribute && !returnValue->IsNull() && !returnValue->IsUndefined() && event->isBeforeUnloadEvent()) {
         V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, stringReturnValue, returnValue);
         toBeforeUnloadEvent(event)->setReturnValue(stringReturnValue);
     }
 
     if (m_isAttribute && shouldPreventDefault(returnValue))
         event->preventDefault();
@@ skipping 24 matching lines @@
 {
     return m_isolate->InContext() && m_world == DOMWrapperWorld::current(m_isolate);
 }
 
 void V8AbstractEventListener::setWeakCallback(const v8::WeakCallbackData<v8::Object, V8AbstractEventListener> &data)
 {
     data.GetParameter()->m_listener.clear();
 }
 
 } // namespace WebCore