Handlify Object::GetPrototype and (most) callers.

src/handles.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 415 matching lines @@
   Handle<JSObject> arguments_boilerplate = Handle<JSObject>(
       isolate->context()->native_context()->sloppy_arguments_boilerplate(),
       isolate);
   Handle<JSFunction> arguments_function = Handle<JSFunction>(
       JSFunction::cast(arguments_boilerplate->map()->constructor()),
       isolate);
 
   // Only collect keys if access is permitted.
   for (Handle<Object> p = object;
        *p != isolate->heap()->null_value();
-       p = Handle<Object>(p->GetPrototype(isolate), isolate)) {
+       p = Object::GetPrototype(isolate, p)) {
     if (p->IsJSProxy()) {
       Handle<JSProxy> proxy(JSProxy::cast(*p), isolate);
       Handle<Object> args[] = { proxy };
       Handle<Object> names;
       ASSIGN_RETURN_ON_EXCEPTION(
           isolate, names,
           Execution::Call(isolate,
                           isolate->proxy_enumerate(),
                           object,
                           ARRAY_SIZE(args),
@@ skipping 247 matching lines @@
                                    Handle<Code> code) {
   heap->EnsureWeakObjectToCodeTable();
   Handle<DependentCode> dep(heap->LookupWeakObjectToCodeDependency(*object));
   dep = DependentCode::Insert(dep, DependentCode::kWeakCodeGroup, code);
   CALL_HEAP_FUNCTION_VOID(heap->isolate(),
                           heap->AddWeakObjectToCodeDependency(*object, *dep));
 }
 
 
 } }  // namespace v8::internal