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

tests/compiler/dart2js/call_site_type_inferer_test.dart

Index: tests/compiler/dart2js/call_site_type_inferer_test.dart
diff --git a/tests/compiler/dart2js/call_site_type_inferer_test.dart b/tests/compiler/dart2js/call_site_type_inferer_test.dart
index bad589f6f2b886ab26a12b7eed011db5cc2cdc99..7e75dd1148fbfd04cb329fb709cbc316c983e637 100644
--- a/tests/compiler/dart2js/call_site_type_inferer_test.dart
+++ b/tests/compiler/dart2js/call_site_type_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.disableInlining = disableInlining;
   compiler.runCompiler(uri);