Add a weak property type to the virtual machine.

runtime/vm/class_finalizer.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/class_finalizer.h"
 
 #include "vm/flags.h"
 #include "vm/heap.h"
 #include "vm/isolate.h"
 #include "vm/longjump.h"
@@ skipping 245 matching lines @@
   cls = object_store->external_uint32_array_class();
   ASSERT(ExternalUint32Array::InstanceSize() == cls.instance_size());
   cls = object_store->external_int64_array_class();
   ASSERT(ExternalInt64Array::InstanceSize() == cls.instance_size());
   cls = object_store->external_uint64_array_class();
   ASSERT(ExternalUint64Array::InstanceSize() == cls.instance_size());
   cls = object_store->external_float32_array_class();
   ASSERT(ExternalFloat32Array::InstanceSize() == cls.instance_size());
   cls = object_store->external_float64_array_class();
   ASSERT(ExternalFloat64Array::InstanceSize() == cls.instance_size());
+  cls = object_store->weak_property_class();
+  ASSERT(WeakProperty::InstanceSize() == cls.instance_size());
 #endif  // defined(DEBUG)
 
   // Remember the currently pending classes.
   const GrowableObjectArray& class_array =
       GrowableObjectArray::Handle(object_store->pending_classes());
   for (intptr_t i = 0; i < class_array.Length(); i++) {
     // TODO(iposva): Add real checks.
     cls ^= class_array.At(i);
     if (cls.is_finalized() || cls.is_prefinalized()) {
       // Pre-finalized bootstrap classes must not define any fields.
@@ skipping 91 matching lines @@
       case kExternalInt32ArrayCid:
       case kUint32ArrayCid:
       case kExternalUint32ArrayCid:
       case kInt64ArrayCid:
       case kExternalInt64ArrayCid:
       case kUint64ArrayCid:
       case kExternalUint64ArrayCid:
       case kFloat32ArrayCid:
       case kExternalFloat32ArrayCid:
       case kFloat64ArrayCid:
-      case kExternalFloat64ArrayCid: {
+      case kExternalFloat64ArrayCid:
+      case kWeakPropertyCid: {
         const Script& script = Script::Handle(cls.script());
         ReportError(script, cls.token_pos(),
                     "'%s' is not allowed to extend '%s'",
                     String::Handle(cls.Name()).ToCString(),
                     String::Handle(super_class.Name()).ToCString());
         break;
       }
       default: break;
     }
   }
@@ skipping 1116 matching lines @@
 void ClassFinalizer::ReportError(const char* format, ...) {
   va_list args;
   va_start(args, format);
   const Error& error = Error::Handle(
       Parser::FormatError(Script::Handle(), -1, "Error", format, args));
   va_end(args);
   ReportError(error);
 }
 
 }  // namespace dart