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

tests/compiler/dart2js/call_site_type_inferer_static_test.dart

Index: tests/compiler/dart2js/call_site_type_inferer_static_test.dart
diff --git a/tests/compiler/dart2js/call_site_type_inferer_static_test.dart b/tests/compiler/dart2js/call_site_type_inferer_static_test.dart
index 5a772278f69309fab6d1b77b795d50de82fbabcb..e8a1f0b3537dc0475bdf5992231af2a2729b0a39 100644
--- a/tests/compiler/dart2js/call_site_type_inferer_static_test.dart
+++ b/tests/compiler/dart2js/call_site_type_inferer_static_test.dart
@@ -13,7 +13,7 @@ void compileAndFind(String code,
                     String functionName,
                     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);