Merge the dart:uri library into dart:core and update the Uri class

tests/compiler/dart2js/field_type_simple_inferer_test.dart

Index: tests/compiler/dart2js/field_type_simple_inferer_test.dart
diff --git a/tests/compiler/dart2js/field_type_simple_inferer_test.dart b/tests/compiler/dart2js/field_type_simple_inferer_test.dart
index 7422b801c4b4f20759b0ee563ecb5aed9a2d58b7..edac5817fa1303d143d932caa9fe6be30e42e548 100644
--- a/tests/compiler/dart2js/field_type_simple_inferer_test.dart
+++ b/tests/compiler/dart2js/field_type_simple_inferer_test.dart
@@ -14,7 +14,7 @@ void compileAndFind(String code,
                     String memberName,
                     bool disableInlining,
                     check(compiler, element)) {
-  Uri uri = new Uri.fromComponents(scheme: 'source');
+  Uri uri = new Uri(scheme: 'source');
   var compiler = compilerFor(code, uri);
   compiler.runCompiler(uri);
   compiler.disableInlining = disableInlining;