Add %TypedArray% to proto chain

src/runtime/runtime-object.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/debug.h"
 #include "src/messages.h"
@@ skipping 138 matching lines @@
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(Object, obj, 0);
   Handle<Object> result;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
                                      Runtime::GetPrototype(isolate, obj));
   return *result;
 }
 
 
+// Set object.__proto__

[adamk, 2015/06/13 00:49:38]

I'd say "Set the [[Prototype]] internal slot" instead, since
Runtime_SetPrototype below is what we have to use for actually setting __proto__
from script.

[Dan Ehrenberg, 2015/06/13 05:54:09]

Done.

 RUNTIME_FUNCTION(Runtime_InternalSetPrototype) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, prototype, 1);
   DCHECK(!obj->IsAccessCheckNeeded());
   DCHECK(!obj->map()->is_observed());
   Handle<Object> result;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
       isolate, result, JSObject::SetPrototype(obj, prototype, false));
@@ skipping 1272 matching lines @@
   CONVERT_PROPERTY_ATTRIBUTES_CHECKED(attrs, 3);
 
   RETURN_FAILURE_ON_EXCEPTION(
       isolate,
       JSObject::DefineAccessor(object, name, isolate->factory()->null_value(),
                                setter, attrs));
   return isolate->heap()->undefined_value();
 }
 }  // namespace internal
 }  // namespace v8