Merge bleeding edge up to 9192 into the GC branch.

src/accessors.cc

Index: src/accessors.cc
diff --git a/src/accessors.cc b/src/accessors.cc
index e7d6aa0e8b66483ba510c4720945d0d97c82457a..f02efa55a2257db671ea7e0032f956f97eb87043 100644
--- a/src/accessors.cc
+++ b/src/accessors.cc
@@ -599,6 +599,7 @@ MaybeObject* Accessors::FunctionGetArguments(Object* object, void*) {
   if (!found_it) return isolate->heap()->undefined_value();
   Handle<JSFunction> function(holder, isolate);
 
+  if (function->shared()->native()) return isolate->heap()->null_value();
   // Find the top invocation of the function by traversing frames.
   List<JSFunction*> functions(2);
   for (JavaScriptFrameIterator it(isolate); !it.done(); it.Advance()) {
@@ -732,6 +733,7 @@ MaybeObject* Accessors::FunctionGetCaller(Object* object, void*) {
   bool found_it = false;
   JSFunction* holder = FindInPrototypeChain<JSFunction>(object, &found_it);
   if (!found_it) return isolate->heap()->undefined_value();
+  if (holder->shared()->native()) return isolate->heap()->null_value();
   Handle<JSFunction> function(holder, isolate);
 
   FrameFunctionIterator it(isolate, no_alloc);