Tweaks to compile against latest analyzer. Also changes the travis

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.
 
 import 'dart:collection' show HashSet, HashMap, SplayTreeSet;
 
 import 'package:analyzer/analyzer.dart' hide ConstantEvaluator;
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/visitor.dart';
@@ skipping 124 matching lines @@
     _isDartRuntime = currentLibrary.source.uri.toString() == 'dart:_runtime';
   }
 
   TypeProvider get types => _types;
 
   JS.Program emitLibrary(List<CompilationUnit> units) {
     // Copy the AST before modifying it.
     units = units.map(_cloneCompilationUnit).toList();
 
     // Modify the AST to make coercions explicit.
-    new CoercionReifier(rules).reify(units);
+    new CoercionReifier().reify(units);
 
     units.last.directives.forEach(_visit);
 
     // Rather than directly visit declarations, we instead use [_loader] to
     // visit them. It has the ability to sort elements on demand, so
     // dependencies between top level items are handled with a minimal
     // reordering of the user's input code. The loader will call back into
     // this visitor via [_emitModuleItem] when it's ready to visit the item
     // for real.
     _loader.collectElements(currentLibrary, units);
@@ skipping 3730 matching lines @@
 
   @override
   ExpressionFunctionBody visitExpressionFunctionBody(
       ExpressionFunctionBody node) {
     var clone = super.visitExpressionFunctionBody(node);
     (clone as FunctionBodyImpl).localVariableInfo =
         (node as FunctionBodyImpl).localVariableInfo;
     return clone;
   }
 }