Fix mac/git renaming case failure. Aaarrrrgggghhhh.

utils/string_encoding/utf16.dart

 // 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.
 
 #library("utf16");
 #import("unicode_core.dart");
 #import("unicode.dart");
 
 /**
  * Produce a String from a sequence of UTF-16 encoded bytes. The parameters
@@ skipping 253 matching lines @@
     return _utf16beToUtf16CodeUnits(utf16EncodedBytes, offset + 2,
         end - (offset + 2), false);
   } else if (hasUtf16leBom(utf16EncodedBytes, offset, length)) {
     return _utf16leToUtf16CodeUnits(utf16EncodedBytes, offset + 2,
         end - (offset + 2), false);
   } else {
     return _utf16beToUtf16CodeUnits(
         utf16EncodedBytes, offset, end - offset, false);
   }
 }