Store JSGlobalProxy's identity hash directly on the proxy itself

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 6c6e6b361150707da995ca6d9fe7e52f122d198b..fd34906b8c7c8c2a6c22375155cdf5f21481bf17 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -758,16 +758,17 @@ Handle<JSGlobalProxy> Genesis::CreateNewGlobals(
   // Set global_proxy.__proto__ to js_global after ConfigureGlobalObjects
   // Return the global proxy.
 
+  Handle<JSGlobalProxy> global_proxy;
   if (global_object.location() != NULL) {
     ASSERT(global_object->IsJSGlobalProxy());
-    Handle<JSGlobalProxy> global_proxy =
-        Handle<JSGlobalProxy>::cast(global_object);
+    global_proxy = Handle<JSGlobalProxy>::cast(global_object);
     factory()->ReinitializeJSGlobalProxy(global_proxy, global_proxy_function);
-    return global_proxy;
   } else {
-    return Handle<JSGlobalProxy>::cast(
+    global_proxy = Handle<JSGlobalProxy>::cast(
         factory()->NewJSObject(global_proxy_function, TENURED));
+    global_proxy->set_hash(heap()->undefined_value());
   }
+  return global_proxy;
 }