js: fix core.Object, output order, static const fields

lib/src/codegen/dart_codegen.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 dev_compiler.src.codegen.dart_codegen;
 
 import 'dart:io' show File;
 
 import 'package:analyzer/analyzer.dart' as analyzer;
 import 'package:analyzer/src/generated/ast.dart';
@@ skipping 417 matching lines @@
         options, path.join(libraryDir, '${uri.pathSegments.last}'));
     var tm = new reifier.TypeManager(_vm);
     var r = new reifier.UnitCoercionReifier(tm, _vm, _rules);
     r.reify(unit);
     var ids = new Set<Identifier>.from(tm.addedTypes.map((tn) => tn.name));
     var unitGen = new UnitGenerator(unit, out, outDir, _extraImports, ids);
     unitGen.generate();
     out.finalize();
   }
 
-  void _generateLibrary(Iterable<CompilationUnit> units, LibraryInfo info,
-      CheckerReporter reporter) {
+  void _generateLibrary(
+      LibraryUnit unit, LibraryInfo info, CheckerReporter reporter) {
     doOne(unit) {
       var outputDir = makeOutputDirectory(info, unit);
       reporter.enterSource(unit.element.source);
       generateUnit(unit, info, outputDir);
       reporter.leaveSource();
     }
-    isLib(unit) => unit.directives.any((d) => d is LibraryDirective);
-    isNotLib(unit) => !isLib(unit);
-    var libs = units.where(isLib);
-    var parts = units.where(isNotLib);
-    assert(libs.length == 1 || (libs.length == 0 && parts.length == 1));
-    parts.forEach(doOne);
-    libs.forEach(doOne);
+    unit.parts.forEach(doOne);
+    doOne(unit.library);
   }
 
-  String generateLibrary(Iterable<CompilationUnit> units, LibraryInfo info,
-      CheckerReporter reporter) {
+  String generateLibrary(
+      LibraryUnit unit, LibraryInfo info, CheckerReporter reporter) {
     _vm = new reifier.VariableManager();
     _extraImports = new Set<LibraryElement>();
-    _generateLibrary(units, info, reporter);
+    _generateLibrary(unit, info, reporter);
     _extraImports = null;
     _vm = null;
     return null;
   }
 }
 
 class EmptyUnitGenerator extends UnitGeneratorCommon {
   final java_core.PrintWriter _out;
   CompilationUnit unit;
 
   EmptyUnitGenerator(this.unit, java_core.PrintWriter out)
       : _out = out,
         super(out);
 
   void output(String s) => _out.print(s);
   void outputln(String s) => _out.println(s);
 
   void generate() {
     unit.visitChildren(this);
   }
 }
 
 // This class emits the code unchanged, for comparison purposes.
 class EmptyDartGenerator extends codegenerator.CodeGenerator {
   final CompilerOptions options;
 
   EmptyDartGenerator(String outDir, Uri root, TypeRules rules, this.options)
       : super(outDir, root, rules);
 
-  String generateLibrary(Iterable<CompilationUnit> units, LibraryInfo info,
-      CheckerReporter reporter) {
-    for (var unit in units) {
+  String generateLibrary(
+      LibraryUnit library, LibraryInfo info, CheckerReporter reporter) {
+    for (var unit in library.units) {
       var outputDir = makeOutputDirectory(info, unit);
       reporter.enterSource(unit.element.source);
       generateUnit(unit, info, outputDir);
       reporter.leaveSource();
     }
     return null;
   }
 
   void generateUnit(CompilationUnit unit, LibraryInfo info, String libraryDir) {
     var uri = unit.element.source.uri;
     _log.fine("Emitting original unit " + uri.toString());
     FileWriter out = new FileWriter(
         options, path.join(libraryDir, '${uri.pathSegments.last}'));
     var unitGen = new EmptyUnitGenerator(unit, out);
     unitGen.generate();
     out.finalize();
   }
 }