Disable infer-from-overrides by default

lib/src/codegen/js_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.js_codegen;
 
 import 'dart:collection' show HashSet;
 import 'dart:io' show Directory, File;
 
 import 'package:analyzer/analyzer.dart' hide ConstantEvaluator;
@@ skipping 1918 matching lines @@
       CheckerReporter reporter) {
     JS.Program jsTree =
         new JSCodegenVisitor(info, rules).generateLibrary(units, reporter);
 
     var outputPath = path.join(outDir, jsOutputPath(info, root));
     new Directory(path.dirname(outputPath)).createSync(recursive: true);
 
     if (options.emitSourceMaps) {
       var outFilename = path.basename(outputPath);
       var printer = new srcmaps.Printer(outFilename);
-      _writeNode(
-          new SourceMapPrintingContext(printer, path.dirname(outputPath)),
-          jsTree);
+      _writeNode(new SourceMapPrintingContext(
+          printer, path.dirname(outputPath)), jsTree);
       printer.add('//# sourceMappingURL=$outFilename.map');
       // Write output file and source map
       new File(outputPath).writeAsStringSync(printer.text);
       new File('$outputPath.map').writeAsStringSync(printer.map);
     } else {
       new File(outputPath).writeAsStringSync(jsNodeToString(jsTree));
     }
   }
 }
 
@@ skipping 83 matching lines @@
 
     // TODO(jmesserly): in many cases marking the end will be unncessary.
     printer.mark(_location(node.end));
   }
 
   String _getIdentifier(AstNode node) {
     if (node is SimpleIdentifier) return node.name;
     return null;
   }
 }