Add an external array type to support typed arrays.

runtime/vm/class_finalizer.cc

 // Copyright (c) 2011, 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 197 matching lines @@
   cls = object_store->mint_class();
   ASSERT(Mint::InstanceSize() == cls.instance_size());
   cls = object_store->bigint_class();
   ASSERT(Bigint::InstanceSize() == cls.instance_size());
   cls = object_store->bool_class();
   ASSERT(Bool::InstanceSize() == cls.instance_size());
   cls = object_store->array_class();
   ASSERT(Array::InstanceSize() == cls.instance_size());
   cls = object_store->immutable_array_class();
   ASSERT(Array::InstanceSize() == cls.instance_size());
+  cls = object_store->external_array_class();
+  ASSERT(ExternalArray::InstanceSize() == cls.instance_size());
 #endif  // defined(DEBUG)
 
   // Remember the currently pending classes.
   const Array& class_array = Array::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.
       ASSERT(Array::Handle(cls.fields()).Length() == 0);
@@ skipping 841 matching lines @@
   ASSERT(msg_buffer != NULL);
   va_list args;
   va_start(args, format);
   OS::VSNPrint(msg_buffer, kBufferLength, format, args);
   va_end(args);
   isolate->long_jump_base()->Jump(1, msg_buffer);
   UNREACHABLE();
 }
 
 }  // namespace dart