Make hasNext a getter instead of a method.

tests/corelib/string_pattern_test.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.
 // Dart test for testing String.allMatches.
 
 String str = "this is a string with hello here and hello there";
 
 main() {
   testNoMatch();
   testOneMatch();
   testTwoMatches();
   testEmptyPattern();
   testEmptyString();
   testEmptyPatternAndString();
 }
 
 testNoMatch() {
   // Also tests that RegExp groups don't work.
   String helloPattern = "with (hello)";
   Iterable<Match> matches = helloPattern.allMatches(str);
-  Expect.isFalse(matches.iterator().hasNext());
+  Expect.isFalse(matches.iterator().hasNext);
 }
 
 testOneMatch() {
   String helloPattern = "with hello";
   Iterable<Match> matches = helloPattern.allMatches(str);
   var iterator = matches.iterator();
   Match match = iterator.next();
-  Expect.isFalse(iterator.hasNext());
+  Expect.isFalse(iterator.hasNext);
   Expect.equals(str.indexOf('with', 0), match.start());
   Expect.equals(str.indexOf('with', 0) + helloPattern.length, match.end());
   Expect.equals(helloPattern, match.pattern);
   Expect.equals(str, match.str);
   Expect.equals(helloPattern, match[0]);
   Expect.equals(0, match.groupCount());
 }
 
 testTwoMatches() {
   String helloPattern = "hello";
@@ skipping 11 matching lines @@
     Expect.equals(helloPattern, match[0]);
     Expect.equals(0, match.groupCount());
     start = match.end();
   }
   Expect.equals(2, count);
 }
 
 testEmptyPattern() {
   String pattern = "";
   Iterable<Match> matches = pattern.allMatches(str);
-  Expect.isTrue(matches.iterator().hasNext());
+  Expect.isTrue(matches.iterator().hasNext);
 }
 
 testEmptyString() {
   String pattern = "foo";
   String str = "";
   Iterable<Match> matches = pattern.allMatches(str);
-  Expect.isFalse(matches.iterator().hasNext());
+  Expect.isFalse(matches.iterator().hasNext);
 }
 
 testEmptyPatternAndString() {
   String pattern = "";
   String str = "";
   Iterable<Match> matches = pattern.allMatches(str);
-  Expect.isTrue(matches.iterator().hasNext());
+  Expect.isTrue(matches.iterator().hasNext);
 }