Add ImportElement and ExportElement

tests/compiler/dart2js/related_types.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library related_types;
 
+import 'package:compiler/src/commandline_options.dart';
 import 'package:compiler/src/compiler.dart';
 import 'package:compiler/src/core_types.dart';
 import 'package:compiler/src/dart_types.dart';
 import 'package:compiler/src/diagnostics/messages.dart';
 import 'package:compiler/src/elements/elements.dart';
+import 'package:compiler/src/filenames.dart';
 import 'package:compiler/src/resolution/semantic_visitor.dart';
 import 'package:compiler/src/tree/tree.dart';
 import 'package:compiler/src/universe/universe.dart';
 import 'package:compiler/src/world.dart';
+import 'memory_compiler.dart';
+
+main(List<String> arguments) async {
+  if (arguments.isNotEmpty) {
+    Uri entryPoint = Uri.base.resolve(nativeToUriPath(arguments.last));
+    CompilationResult result = await runCompiler(
+        entryPoint: entryPoint,
+        options: [Flags.analyzeOnly, '--categories=Client,Server']);
+    if (result.isSuccess) {
+      checkRelatedTypes(result.compiler);
+    }
+  } else {
+    print('Usage dart related_types.dart <entry-point>');
+  }
+}
 
 /// Check all loaded libraries in [compiler] for unrelated types.
 void checkRelatedTypes(Compiler compiler) {
   for (LibraryElement library in compiler.libraryLoader.libraries) {
     checkLibraryElement(compiler, library);
   }
 }
 
 /// Check [library] for unrelated types.
 void checkLibraryElement(Compiler compiler, LibraryElement library) {
@@ skipping 378 matching lines @@
   ClassElement findClass(DartType type) => type.accept(this, null);
 
   @override
   ClassElement visitType(DartType type, _) => null;
 
   @override
   ClassElement visitInterfaceType(InterfaceType type, _) {
     return type.element;
   }
 }