More dart2js strong mode cleanup.

pkg/compiler/lib/src/elements/modelx.dart

 // Copyright (c) 2013, 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 elements.modelx;
 
 import '../common.dart';
 import '../common/names.dart' show Identifiers;
 import '../common/resolution.dart' show Resolution, ParsingContext;
 import '../compiler.dart' show Compiler;
@@ skipping 480 matching lines @@
 
   /// The element whose usage cause a warning.
   final Element wrappedElement;
 
   WarnOnUseElementX(
       this.warning, this.info, Element enclosingElement, Element wrappedElement)
       : this.wrappedElement = wrappedElement,
         super(wrappedElement.name, ElementKind.WARN_ON_USE, enclosingElement);
 
   Element unwrap(DiagnosticReporter reporter, Spannable usageSpannable) {
-    var unwrapped = wrappedElement;
+    dynamic unwrapped = wrappedElement;
     if (warning != null) {
       Spannable spannable = warning.sourceSpan;
       if (spannable == null) spannable = usageSpannable;
       DiagnosticMessage warningMessage = reporter.createMessage(
           spannable, warning.messageKind, warning.messageArguments);
       List<DiagnosticMessage> infos = <DiagnosticMessage>[];
       if (info != null) {
         Spannable spannable = info.sourceSpan;
         if (spannable == null) spannable = usageSpannable;
         infos.add(reporter.createMessage(
@@ skipping 3003 matching lines @@
       body = node.asFunctionExpression().body;
     }
     return new ParsedResolvedAst(
         declaration,
         node,
         body,
         definingElement.treeElements,
         definingElement.compilationUnit.script.resourceUri);
   }
 }