Make Uri.isAbsolute and Uri.hasAuthority getters.

tests/utils/uri_test.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 uriTest;
 
 import 'dart:utf';
 import 'dart:uri';
 
 testUri(String uri, bool isAbsolute) {
-  Expect.equals(isAbsolute, Uri.parse(uri).isAbsolute());
-  Expect.equals(isAbsolute, new Uri(uri).isAbsolute());
+  Expect.equals(isAbsolute, Uri.parse(uri).isAbsolute);
+  Expect.equals(isAbsolute, new Uri(uri).isAbsolute);
   Expect.stringEquals(uri, Uri.parse(uri).toString());
   Expect.stringEquals(uri, new Uri(uri).toString());
 
   // Test equals and hashCode members.
   Expect.equals(new Uri(uri), new Uri(uri));
   Expect.equals(new Uri(uri).hashCode, new Uri(uri).hashCode);
 }
 
 testEncodeDecode(String orig, String encoded) {
   var e = encodeUri(orig);
@@ skipping 186 matching lines @@
   testEncodeDecodeComponent("\uFFFE", "%EF%BF%BE");
   testEncodeDecodeComponent("\uFFFF", "%EF%BF%BF");
   testEncodeDecodeComponent("\uFFFE", "%EF%BF%BE");
   testEncodeDecodeComponent("\uFFFF", "%EF%BF%BF");
   testEncodeDecodeComponent("\x7f", "%7F");
   testEncodeDecodeComponent("\x80", "%C2%80");
   testEncodeDecodeComponent("\u0800", "%E0%A0%80");
   testEncodeDecodeComponent(":/@',;?&=+\$", "%3A%2F%40'%2C%3B%3F%26%3D%2B%24");
   testEncodeDecodeComponent(s, "%F0%90%80%80");
 }