Fix keyed access of primitive objects in the runtime.

src/execution.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/execution.h"
 
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/messages.h"
@@ skipping 533 matching lines @@
 
 MaybeHandle<Object> Execution::ToDetailString(
     Isolate* isolate, Handle<Object> obj) {
   RETURN_NATIVE_CALL(to_detail_string, { obj });
 }
 
 
 MaybeHandle<Object> Execution::ToObject(
     Isolate* isolate, Handle<Object> obj) {
   if (obj->IsSpecObject()) return obj;
+  // TODO(verwaest): Use Object::ToObject but throw an exception on failure.
   RETURN_NATIVE_CALL(to_object, { obj });
 }
 
 
 MaybeHandle<Object> Execution::ToInteger(
     Isolate* isolate, Handle<Object> obj) {
   RETURN_NATIVE_CALL(to_integer, { obj });
 }
 
 
@@ skipping 94 matching lines @@
 
   isolate_->counters()->stack_interrupts()->Increment();
   isolate_->counters()->runtime_profiler_ticks()->Increment();
   isolate_->runtime_profiler()->OptimizeNow();
 
   return isolate_->heap()->undefined_value();
 }
 
 }  // namespace internal
 }  // namespace v8