Proxies: Make 'with' work, plus minor other fixes

src/heap.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 5829 matching lines @@
   context->set_previous(previous);
   context->set_extension(name);
   context->set_global_object(previous->global_object());
   context->set(Context::THROWN_OBJECT_INDEX, thrown_object);
   return context;
 }
 
 
 MaybeObject* Heap::AllocateWithContext(JSFunction* function,
                                        Context* previous,
-                                       JSObject* extension) {
+                                       JSReceiver* extension) {
   Object* result;
   { MaybeObject* maybe_result = AllocateFixedArray(Context::MIN_CONTEXT_SLOTS);
     if (!maybe_result->ToObject(&result)) return maybe_result;
   }
   Context* context = reinterpret_cast<Context*>(result);
   context->set_map_no_write_barrier(with_context_map());
   context->set_closure(function);
   context->set_previous(previous);
   context->set_extension(extension);
   context->set_global_object(previous->global_object());
@@ skipping 2315 matching lines @@
   if (FLAG_parallel_recompilation) {
     heap_->relocation_mutex_->Lock();
 #ifdef DEBUG
     heap_->relocation_mutex_locked_by_optimizer_thread_ =
         heap_->isolate()->optimizing_compiler_thread()->IsOptimizerThread();
 #endif  // DEBUG
   }
 }
 
 } }  // namespace v8::internal