Remove calls to to-be-deprecated Persistent functions.

Source/bindings/v8/V8ValueCache.cpp

 /*
  * Copyright (C) 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 76 matching lines @@
     ASSERT(!m_stringCache.contains(stringImpl));
     ASSERT(stringImpl->length());
 
     v8::Local<v8::String> newString = makeExternalString(String(stringImpl));
     if (newString.IsEmpty())
         return newString;
 
     v8::Persistent<v8::String> wrapper(isolate, newString);
 
     stringImpl->ref();
-    wrapper.MarkIndependent(isolate);
+    wrapper.MarkIndependent();
     wrapper.MakeWeak(stringImpl, &makeWeakCallback);
     m_lastV8String = UnsafePersistent<v8::String>(wrapper);
     m_lastStringImpl = stringImpl;
     m_stringCache.set(stringImpl, m_lastV8String);
 
     return newString;
 }
 
 void StringCache::makeWeakCallback(v8::Isolate* isolate, v8::Persistent<v8::String>* wrapper, StringImpl* stringImpl)
 {
     StringCache* stringCache = V8PerIsolateData::from(isolate)->stringCache();
     stringCache->m_lastStringImpl = 0;
     stringCache->m_lastV8String.clear();
     ASSERT(stringCache->m_stringCache.contains(stringImpl));
     stringCache->m_stringCache.remove(stringImpl);
     stringImpl->deref();
-    wrapper->Dispose(isolate);
+    wrapper->Dispose();
 }
 
 } // namespace WebCore