Rename new Uri.fromString to Uri.parse.

tests/compiler/dart2js/uri_extras_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.
 
 import 'dart:uri';
 
 import '../../../sdk/lib/_internal/compiler/implementation/util/uri_extras.dart';
 
 
 void testRelativize() {
   void c(String expected, String base, String path, bool isWindows) {
     if (isWindows == null) {
       c(expected, base, path, true);
       c(expected, base, path, false);
       return;
     }
     String r;
 
-    r = relativize(new Uri.fromString('file:$base'),
-                   new Uri.fromString('file:$path'),
+    r = relativize(Uri.parse('file:$base'),
+                   Uri.parse('file:$path'),
                    isWindows);
     Expect.stringEquals(expected, r);
 
-    r = relativize(new Uri.fromString('FILE:$base'),
-                   new Uri.fromString('FILE:$path'),
+    r = relativize(Uri.parse('FILE:$base'),
+                   Uri.parse('FILE:$path'),
                    isWindows);
     Expect.stringEquals(expected, r);
 
-    r = relativize(new Uri.fromString('file:$base'),
-                   new Uri.fromString('FILE:$path'),
+    r = relativize(Uri.parse('file:$base'),
+                   Uri.parse('FILE:$path'),
                    isWindows);
     Expect.stringEquals(expected, r);
 
-    r = relativize(new Uri.fromString('FILE:$base'),
-                   new Uri.fromString('file:$path'),
+    r = relativize(Uri.parse('FILE:$base'),
+                   Uri.parse('file:$path'),
                    isWindows);
     Expect.stringEquals(expected, r);
   }
   c('bar', '/', '/bar', null);
   c('/bar', '/foo', '/bar', null);
   c('/bar', '/foo/', '/bar', null);
 
   c('bar', '///c:/', '///c:/bar', true);
   c('/c:/bar', '///c:/foo', '///c:/bar', true);
   c('/c:/bar', '///c:/foo/', '///c:/bar', true);
@@ skipping 15 matching lines @@
 
   c('../person/file.dart', '/Users/other/', '/Users/person/file.dart', false);
 
   c('/Users/person/file.dart', '/Users/other/', '/Users/person/file.dart',
     true);
 }
 
 void main() {
   testRelativize();
 }