Rename new Uri.fromString to Uri.parse.

pkg/http/lib/src/base_client.dart

Index: pkg/http/lib/src/base_client.dart
diff --git a/pkg/http/lib/src/base_client.dart b/pkg/http/lib/src/base_client.dart
index 7eb972fd2a0c8fd392398244785d91b38a92262d..cda7b0d3fbba01099552980d4849f53c1791a2f7 100644
--- a/pkg/http/lib/src/base_client.dart
+++ b/pkg/http/lib/src/base_client.dart
@@ -110,7 +110,7 @@ abstract class BaseClient implements Client {
     // Wrap everything in a Future block so that synchronous validation errors
     // are passed asynchronously through the Future chain.
     return async.then((_) {
-      if (url is String) url = new Uri.fromString(url);
+      if (url is String) url = Uri.parse(url);
       var request = new Request(method, url);
 
       if (headers != null) mapAddAll(request.headers, headers);