Revert "Revert "Implement {Int,Uint}{8,16,32,64} and Float{32,64} typed arrays.""

runtime/bin/socket_impl.dart

Index: runtime/bin/socket_impl.dart
diff --git a/runtime/bin/socket_impl.dart b/runtime/bin/socket_impl.dart
index e4f11dbf25a061c5c967b5f8413336c9b7330b59..b52f3024ea5a0f14b2f6079bd9833a828686b4a1 100644
--- a/runtime/bin/socket_impl.dart
+++ b/runtime/bin/socket_impl.dart
@@ -411,10 +411,10 @@ class _Socket extends _SocketBase implements Socket {
       // supplied List to a ByteArray if it isn't already.
       List outBuffer;
       int outOffset = offset;
-      if (buffer is ByteArray || buffer is ObjectArray) {
+      if (buffer is Uint8List || buffer is ObjectArray) {
         outBuffer = buffer;
       } else {
-        outBuffer = new ByteArray(bytes);
+        outBuffer = new Uint8List(bytes);
         outOffset = 0;
         int j = offset;
         for (int i = 0; i < bytes; i++) {