Remove unnecessary %UnwrapGlobalProxy calls from object-observe.js

src/runtime.cc

 // Copyright 2012 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 14933 matching lines @@
   // isolate. If it's called more often, the map should be moved into the
   // strong root list.
   Handle<Map> map =
       isolate->factory()->NewMap(JS_WEAK_MAP_TYPE, JSWeakMap::kSize);
   Handle<JSWeakMap> weakmap =
       Handle<JSWeakMap>::cast(isolate->factory()->NewJSObjectFromMap(map));
   return WeakCollectionInitialize(isolate, weakmap);
 }
 
 
-RUNTIME_FUNCTION(MaybeObject*, Runtime_UnwrapGlobalProxy) {
-  SealHandleScope shs(isolate);
-  ASSERT(args.length() == 1);
-  Object* object = args[0];
-  if (object->IsJSGlobalProxy()) {
-    object = object->GetPrototype(isolate);
-    if (object->IsNull()) return isolate->heap()->undefined_value();
-  }
-  return object;
-}
-
-
 RUNTIME_FUNCTION(MaybeObject*, Runtime_IsAccessAllowedForObserver) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 3);
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, observer, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 1);
   ASSERT(object->map()->is_access_check_needed());
   Handle<Object> key = args.at<Object>(2);
   SaveContext save(isolate);
   isolate->set_context(observer->context());
   if (!isolate->MayNamedAccessWrapper(object,
@@ skipping 262 matching lines @@
   }
 }
 
 
 void Runtime::OutOfMemory() {
   Heap::FatalProcessOutOfMemory("CALL_AND_RETRY_LAST", true);
   UNREACHABLE();
 }
 
 } }  // namespace v8::internal