Rethrow exception when swallowing it is not intended.

Source/bindings/v8/V8NodeFilterCondition.cpp

 /*
  * Copyright (C) 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 51 matching lines @@
     v8::Isolate* isolate = m_scriptState->isolate();
     ASSERT(!m_scriptState->context().IsEmpty());
     v8::HandleScope handleScope(isolate);
     v8::Handle<v8::Value> filter = m_filter.newLocal(isolate);
 
     ASSERT(filter.IsEmpty() || filter->IsObject());
     if (filter.IsEmpty())
         return NodeFilter::FILTER_ACCEPT;
 
     v8::TryCatch exceptionCatcher;
+    V8RethrowTryCatchScope rethrow(exceptionCatcher);
 
     v8::Handle<v8::Function> callback;
     if (filter->IsFunction())
         callback = v8::Handle<v8::Function>::Cast(filter);
     else {
         v8::Local<v8::Value> value = filter->ToObject()->Get(v8AtomicString(isolate, "acceptNode"));
         if (value.IsEmpty() || !value->IsFunction()) {
             throwTypeError("NodeFilter object does not have an acceptNode function", isolate);
             return NodeFilter::FILTER_REJECT;
         }
@@ skipping 15 matching lines @@
 
     return result->Int32Value();
 }
 
 void V8NodeFilterCondition::setWeakCallback(const v8::WeakCallbackData<v8::Value, V8NodeFilterCondition>& data)
 {
     data.GetParameter()->m_filter.clear();
 }
 
 } // namespace WebCore