Change cctest/test-lockers to not copy persistent handles around.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 8efb7c33c532f714277680ab503f4025fe233d80..c3217f81f0c12c9932efee6029ca978a9ff4f1ba 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -376,6 +376,9 @@ template <class T> class Persistent : public Handle<T> {
 
   template <class S> V8_INLINE(Persistent(S* that)) : Handle<T>(that) { }
 
+  template <class S> V8_INLINE(Persistent(Isolate* isolate, Handle<S> that))
+      : Handle<T>(New(isolate, that)) { }

[dcarney, 2013/04/24 13:46:02]

Should be a comment here.  This is required for handlocalypse, but is a HUGE
departure from the V8 api, since it's a call to New without being explicit.

+
   /**
    * "Casts" a plain handle which is known to be a persistent handle
    * to a persistent handle.