The dart version of typeddata library has changed to be compatible with the dart2js implementation

runtime/vm/object.h

Index: runtime/vm/object.h
===================================================================
--- runtime/vm/object.h	(revision 38347)
+++ runtime/vm/object.h	(working copy)
@@ -4344,6 +4344,7 @@
 
   // TODO(iposva): Determine if this gets in the way of Smi.
   HEAP_OBJECT_IMPLEMENTATION(Instance, Object);
+  friend class ByteBuffer;
   friend class Class;
   friend class Closure;
   friend class DeferredObject;
@@ -6720,6 +6721,28 @@
 };
 
 
+class ByteBuffer : public AllStatic {
+ public:
+  static RawInstance* Data(const Instance& view_obj) {
+    ASSERT(!view_obj.IsNull());
+    return *reinterpret_cast<RawInstance**>(view_obj.raw_ptr() + kDataOffset);
+  }
+
+  static intptr_t NumberOfFields() {
+    return kDataOffset;
+  }
+
+  static intptr_t data_offset() {
+    return kWordSize * kDataOffset;
+  }
+
+ private:
+  enum {
+    kDataOffset = 1,
+  };
+};
+
+
 class Closure : public AllStatic {
  public:
   static RawFunction* function(const Instance& closure) {