Make hasNext a getter instead of a method.

lib/compiler/implementation/scanner/byte_strings.dart

 // 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.
 
 /**
  * An abstract string representation.
  */
 class ByteString implements SourceString {
   final List<int> bytes;
   final int offset;
@@ skipping 71 matching lines @@
 
 
 class AsciiStringIterator implements Iterator<int> {
   final List<int> bytes;
   int offset;
   final int end;
   AsciiStringIterator(List<int> bytes)
       : this.bytes = bytes, offset = 0, end = bytes.length;
   AsciiStringIterator.range(List<int> bytes, int from, int length)
       : this.bytes = bytes, offset = from, end = from + length;
-  bool hasNext() => offset < end;
+  bool get hasNext => offset < end;
   int next() => bytes[offset++];
 }
 
 
 /**
  * A string that consists of characters that can be encoded as UTF-8.
  */
 class Utf8String extends ByteString {
   final String charset = "UTF8";
 
@@ skipping 32 matching lines @@
  * A ByteString-valued token.
  */
 class ByteStringToken extends Token {
   final ByteString value;
 
   ByteStringToken(PrecedenceInfo info, ByteString this.value, int charOffset)
     : super(info, charOffset);
 
   String toString() => value.toString();
 }