Fix unaligned access to TypedData from native code.

tests/language/vm/unaligned_integer_access_register_index_test.dart

 // Copyright (c) 2016, 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.
 // VMOptions=--optimization_counter_threshold=10 --no-background_compilation
 
 import 'dart:typed_data';
 import 'package:expect/expect.dart';
 
 unalignedUint16() {
   var bytes = new ByteData(64);
@@ skipping 36 matching lines @@
 }
 
 unalignedInt64() {
   var bytes = new ByteData(64);
   for (var i = 0; i < 8; i++) {
     bytes.setInt64(i, -0x12341234);
     Expect.equals(-0x12341234, bytes.getInt64(i));
   }
 }
 
-unalignedFloat32() {
-  var bytes = new ByteData(64);
-  for (var i = 0; i < 4; i++) {
-    bytes.setFloat32(i, 16.25);
-    Expect.equals(16.25, bytes.getFloat32(i));
-  }
-}
-
-unalignedFloat64() {
-  var bytes = new ByteData(64);
-  for (var i = 0; i < 8; i++) {
-    bytes.setFloat64(i, 16.25);
-    Expect.equals(16.25, bytes.getFloat64(i));
-  }
-}
-
 main() {
   for (var i = 0; i < 20; i++) {
     unalignedUint16();
     unalignedInt16();
     unalignedUint32();
     unalignedInt32();
     unalignedUint64();
     unalignedInt64();
-    unalignedFloat32();
-    unalignedFloat64();
   }
 }