Remove dart backend

lib/devc.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.
 
 /// Command line tool to run the checker on a Dart program.
 library dev_compiler.devc;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:analyzer/src/generated/error.dart' as analyzer;
 import 'package:analyzer/src/generated/engine.dart'
     show AnalysisContext, ChangeSet;
 import 'package:analyzer/src/generated/source.dart' show Source;
 import 'package:logging/logging.dart' show Level, Logger, LogRecord;
 import 'package:path/path.dart' as path;
 import 'package:shelf/shelf.dart' as shelf;
 import 'package:shelf/shelf_io.dart' as shelf;
 import 'package:shelf_static/shelf_static.dart' as shelf_static;
 
 import 'src/analysis_context.dart';
 import 'src/checker/checker.dart';
 import 'src/checker/rules.dart';
 import 'src/codegen/code_generator.dart' show CodeGenerator;
-import 'src/codegen/dart_codegen.dart';
 import 'src/codegen/html_codegen.dart';
 import 'src/codegen/js_codegen.dart';
 import 'src/dependency_graph.dart';
 import 'src/info.dart'
     show AnalyzerError, CheckerResults, LibraryInfo, LibraryUnit;
 import 'src/options.dart';
 import 'src/report.dart';
 import 'src/utils.dart';
 
 /// Sets up the type checker logger to print a span that highlights error
@@ skipping 47 matching lines @@
             ? ResolverOptions.implicitHtmlFile
             : inputFile));
     var entryNode = graph.nodeFromUri(inputUri);
 
     return new Compiler._(
         options, context, reporter, rules, checker, entryNode);
   }
 
   Compiler._(this.options, this.context, this._reporter, this.rules,
       this._checker, this._entryNode) {
-    if (options.dumpSrcDir != null) {
-      _generators.add(new EmptyDartGenerator(this));
-    }
     if (options.outputDir != null) {
-      _generators.add(
-          options.outputDart ? new DartGenerator(this) : new JSGenerator(this));
+      _generators.add(new JSGenerator(this));
     }
     // TODO(sigmund): refactor to support hashing of the dart output?
-    _hashing =
-        options.enableHashing && _generators.length == 1 && !options.outputDart;
+    _hashing = options.enableHashing && _generators.length == 1;
   }
 
   Uri get entryPointUri => _entryNode.uri;
 
   bool _buildSource(SourceNode node) {
     if (node is HtmlSourceNode) {
       _buildHtmlFile(node);
     } else if (node is DartSourceNode) {
       _buildDartLibrary(node);
     } else if (node is ResourceSourceNode) {
@@ skipping 13 matching lines @@
     _reporter.enterHtml(uri);
     var output = generateEntryHtml(node, options);
     if (output == null) {
       _failure = true;
       return;
     }
     _reporter.leaveHtml();
     var filename = path.basename(node.uri.path);
     String outputFile = path.join(options.outputDir, filename);
     new File(outputFile).writeAsStringSync(output);
-
-    if (options.outputDart) return;
   }
 
   void _buildResourceFile(ResourceSourceNode node) {
     // ResourceSourceNodes files that just need to be copied over to the output
     // location. These can be external dependencies or pieces of the
     // dev_compiler runtime.
-    if (options.outputDir == null || options.outputDart) return;
+    if (options.outputDir == null) return;
     var filepath = resourceOutputPath(node.uri, _entryNode.uri);
     assert(filepath != null);
     filepath = path.join(options.outputDir, filepath);
     var dir = path.dirname(filepath);
     new Directory(dir).createSync(recursive: true);
     new File.fromUri(node.source.uri).copySync(filepath);
     if (_hashing) node.cachingHash = computeHashFromFile(filepath);
   }
 
   bool _isEntry(DartSourceNode node) {
@@ skipping 171 matching lines @@
       // Note: the cache-control header should be enough, but this doesn't hurt
       // and can help renew the policy after it expires.
       headers['ETag'] = hash;
     }
     return response.change(headers: headers);
   };
 }
 
 final _log = new Logger('dev_compiler');
 final _earlyErrorResult = new CheckerResults(const [], null, true);