Revert trunk to version 3.16.4.

src/handles.cc

Index: src/handles.cc
diff --git a/src/handles.cc b/src/handles.cc
index c0dea20aae3c09b6a98d3b4bd851e8fc15da140b..ed92c414e37c1e8f3f423525dce17b603e4f1fe5 100644
--- a/src/handles.cc
+++ b/src/handles.cc
@@ -375,15 +375,6 @@ Handle<JSValue> GetScriptWrapper(Handle<Script> script) {
   Handle<JSFunction> constructor = isolate->script_function();
   Handle<JSValue> result =
       Handle<JSValue>::cast(isolate->factory()->NewJSObject(constructor));
-
-  // The allocation might have triggered a GC, which could have called this
-  // function recursively, and a wrapper has already been created and cached.
-  // In that case, simply return the cached wrapper.
-  if (script->wrapper()->foreign_address() != NULL) {
-    return Handle<JSValue>(
-        reinterpret_cast<JSValue**>(script->wrapper()->foreign_address()));
-  }
-
   result->set_value(*script);
 
   // Create a new weak global handle and use it to cache the wrapper