Make hasNext a getter instead of a method.

tests/corelib/string_pattern_test.dart

Index: tests/corelib/string_pattern_test.dart
diff --git a/tests/corelib/string_pattern_test.dart b/tests/corelib/string_pattern_test.dart
index 3fb35337ed0684e21a7efa1d2c508c902d84a293..88fc78c808b1e846c3a23b5cbae1be6945b5726f 100644
--- a/tests/corelib/string_pattern_test.dart
+++ b/tests/corelib/string_pattern_test.dart
@@ -18,7 +18,7 @@ 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() {
@@ -26,7 +26,7 @@ testOneMatch() {
   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);
@@ -58,19 +58,19 @@ testTwoMatches() {
 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);
 }