Remove dart2jslib.dart

pkg/compiler/lib/src/dart_backend/backend_ast_to_frontend_ast.dart

 // Copyright (c) 2014, 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 dart_tree_printer;
 
 import '../constants/values.dart' as values;
 import '../dart_types.dart' as types;
-import '../dart2jslib.dart' as dart2js;
+import '../diagnostics/invariant.dart' show
+    invariant;
 import '../elements/elements.dart' as elements;
 import '../resolution/resolution.dart' show
     TreeElementMapping;
 import '../tree/tree.dart' as tree;
 import '../scanner/scannerlib.dart';
 import '../util/util.dart';
 import 'backend_ast_nodes.dart';
 import 'backend_ast_emitter.dart' show TypeGenerator;
 
 /// Translates the backend AST to Dart frontend AST.
@@ skipping 1124 matching lines @@
           typeAnnotations, null, ',');
     }
   }
 
   /// Creates a [tree.NamedMixinApplication] node for [cls].
   // TODO(johnniwinther): Unify creation of mixin lists between
   // [NamedMixinApplicationElement] and [ClassElement].
   tree.NamedMixinApplication makeNamedMixinApplication(
        elements.MixinApplicationElement cls) {
 
-    assert(dart2js.invariant(cls, !cls.isUnnamedMixinApplication,
+    assert(invariant(cls, !cls.isUnnamedMixinApplication,
         message: "Cannot create ClassNode for unnamed mixin application "
                  "$cls."));
     tree.Modifiers modifiers = makeModifiers(isAbstract: cls.isAbstract);
     tree.Identifier name = makeIdentifier(cls.name);
     tree.NodeList typeParameters = makeTypeParameters(cls.typeVariables);
 
     Set<types.DartType> mixinTypes = new Set<types.DartType>();
     Link<tree.Node> mixins = const Link<tree.Node>();
 
     void addMixin(types.DartType mixinType) {
@@ skipping 26 matching lines @@
   tree.Enum makeEnum(elements.EnumClassElement cls) {
     return new tree.Enum(
         enumToken,
         makeIdentifier(cls.name),
         makeList(',', cls.enumValues.map((e) => makeIdentifier(e.name)),
                  open: openBrace, close: closeBrace));
   }
 
   /// Creates a [tree.ClassNode] node for [cls].
   tree.ClassNode makeClassNode(elements.ClassElement cls) {
-    assert(dart2js.invariant(cls, !cls.isUnnamedMixinApplication,
+    assert(invariant(cls, !cls.isUnnamedMixinApplication,
         message: "Cannot create ClassNode for unnamed mixin application "
                  "$cls."));
     tree.Modifiers modifiers = makeModifiers(isAbstract: cls.isAbstract);
     tree.Identifier name = makeIdentifier(cls.name);
     tree.NodeList typeParameters = makeTypeParameters(cls.typeVariables);
     tree.Node supernode;
     types.InterfaceType supertype = cls.supertype;
     Set<types.DartType> mixinTypes = new Set<types.DartType>();
     Link<tree.Node> mixins = const Link<tree.Node>();
 
@@ skipping 121 matching lines @@
             printStringChunk(chunk.previous),
             node);
       } else {
         return node;
       }
     }
     return printStringChunk(output.chunk);
   }
 
 }