(Concept patch) Simplify WTF::HashTable::add() return value for size and performance

Source/bindings/v8/NPV8Object.cpp

 /*
  * Copyright (C) 2004, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 123 matching lines @@
         V8NPObjectMap::iterator iter = v8NPObjectMap->find(v8ObjectHash);
         if (iter != v8NPObjectMap->end()) {
             V8NPObjectVector& objects = iter->value;
             for (size_t index = 0; index < objects.size(); ++index) {
                 V8NPObject* v8npObject = objects.at(index);
                 if (v8npObject->v8Object == object && v8npObject->rootObject == root) {
                     _NPN_RetainObject(&v8npObject->object);
                     return reinterpret_cast<NPObject*>(v8npObject);
                 }
             }
+            objectVector = &iter->value;
         } else {
-            iter = v8NPObjectMap->set(v8ObjectHash, V8NPObjectVector()).iterator;
+            objectVector = &v8NPObjectMap->set(v8ObjectHash, V8NPObjectVector()).iterator->value;
         }
-        objectVector = &iter->value;
     }
 
     V8NPObject* v8npObject = reinterpret_cast<V8NPObject*>(_NPN_CreateObject(npp, &V8NPObjectClass));
     // This is uninitialized memory, we need to clear it so that
     // Persistent::Reset won't try to Dispose anything bogus.
     new (&v8npObject->v8Object) v8::Persistent<v8::Object>();
     v8npObject->v8Object.Reset(isolate, object);
     v8npObject->rootObject = root;
 
     if (objectVector)
@@ skipping 446 matching lines @@
 
         convertV8ObjectToNPVariant(resultObject, npObject, result, isolate);
         return true;
     }
 
     if (NP_CLASS_STRUCT_VERSION_HAS_CTOR(npObject->_class) && npObject->_class->construct)
         return npObject->_class->construct(npObject, arguments, argumentCount, result);
 
     return false;
 }