First round of runtime.cc handlification.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index e765aaee23074a41347a715936b9d5c5bd90b28a..d57fa9f26f3eac43d3aab9c1088b8dce44eb6293 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -907,6 +907,7 @@ MaybeHandle<Object> Object::GetElementWithReceiver(Isolate* isolate,
 
 
 Object* Object::GetPrototype(Isolate* isolate) {
+  DisallowHeapAllocation no_alloc;
   if (IsSmi()) {
     Context* context = isolate->context()->native_context();
     return context->number_function()->instance_prototype();
@@ -938,6 +939,12 @@ Object* Object::GetPrototype(Isolate* isolate) {
 }
 
 
+Handle<Object> Object::GetPrototype(Isolate* isolate,
+                                    Handle<Object> object) {
+  return handle(object->GetPrototype(isolate), isolate);
+}
+
+
 Map* Object::GetMarkerMap(Isolate* isolate) {
   if (IsSmi()) return isolate->heap()->heap_number_map();
   return HeapObject::cast(this)->map();