Mostly use entities in use.dart

pkg/compiler/lib/src/compiler.dart

 // Copyright (c) 2012, 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 dart2js.compiler_base;
 
 import 'dart:async' show EventSink, Future;
 
 import '../compiler_new.dart' as api;
 import 'cache_strategy.dart' show CacheStrategy;
@@ skipping 116 matching lines @@
   bool stopAfterTypeInference = false;
 
   /// Output provider from user of Compiler API.
   api.CompilerOutput userOutputProvider;
 
   List<Uri> librariesToAnalyzeWhenRun;
 
   ResolvedUriTranslator get resolvedUriTranslator;
 
   LibraryElement mainApp;
-  FunctionElement mainFunction;
+  MethodElement mainFunction;
 
   DiagnosticReporter get reporter => _reporter;
   CommonElements get commonElements => _commonElements;
   Resolution get resolution => _resolution;
   ParsingContext get parsingContext => _parsingContext;
 
   // TODO(zarah): Remove this map and incorporate compile-time errors
   // in the model.
   /// Tracks elements with compile-time errors.
   final Map<Element, List<DiagnosticMessage>> elementsWithCompileTimeErrors =
@@ skipping 2084 matching lines @@
   _ElementScanner(this.scanner);
   void scanLibrary(LibraryElement library) => scanner.scanLibrary(library);
   void scanUnit(CompilationUnitElement unit) => scanner.scan(unit);
 }
 
 class _EmptyEnvironment implements Environment {
   const _EmptyEnvironment();
 
   String valueOf(String key) => null;
 }