Changed default Uri constructor to Uri.fromComponents(), new default constructor is Uri.fromString(…

dart/tests/compiler/dart2js/mock_compiler.dart

Index: dart/tests/compiler/dart2js/mock_compiler.dart
diff --git a/dart/tests/compiler/dart2js/mock_compiler.dart b/dart/tests/compiler/dart2js/mock_compiler.dart
index 97bbadec3c2512056ff188628aa5989eb7a3e8b4..e1379387f7cab1210f845aa121724f9ada3f9a4a 100644
--- a/dart/tests/compiler/dart2js/mock_compiler.dart
+++ b/dart/tests/compiler/dart2js/mock_compiler.dart
@@ -74,7 +74,7 @@ class MockCompiler extends Compiler {
       : warnings = [], errors = [],
         sourceFiles = new Map<String, SourceFile>(),
         super() {
-    Uri uri = new Uri(scheme: "source");
+    Uri uri = new Uri.fromComponents(scheme: "source");
     var script = new Script(uri, new MockFile(coreSource));
     coreLibrary = new LibraryElement(script);
     parseScript(coreSource, coreLibrary);
@@ -199,7 +199,7 @@ void importLibrary(LibraryElement target, LibraryElement imported,
 }
 
 LibraryElement mockLibrary(Compiler compiler, String source) {
-  Uri uri = new Uri(scheme: "source");
+  Uri uri = new Uri.fromComponents(scheme: "source");
   var library = new LibraryElement(new Script(uri, new MockFile(source)));
   importLibrary(library, compiler.coreLibrary, compiler);
   return library;