All strong mode cleaning of dart2js.

tests/compiler/dart2js/sourcemaps/sourcemap_html_helper.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.
 
 /// Helper for creating HTML visualization of the source map information
 /// generated by a [SourceMapProcessor].
 
 library sourcemap.html.helper;
 
 import 'dart:convert';
@@ skipping 91 matching lines @@
       return sourceLocationIndexMap.length;
     });
   }
 
   int getIndex(SourceLocation sourceLocation) {
     return sourceLocationIndexMap[sourceLocation];
   }
 }
 
 abstract class CssColorScheme {
-  String singleLocationToCssColor(var id);
+  String singleLocationToCssColor(int id);
 
-  String multiLocationToCssColor(List ids);
+  String multiLocationToCssColor(List<int> ids);
 
   bool get showLocationAsSpan;
 }
 
 class CustomColorScheme implements CssColorScheme {
   final bool showLocationAsSpan;
   final Function single;
   final Function multi;
 
   CustomColorScheme(
       {this.showLocationAsSpan: false,
-      String this.single(var id),
-      String this.multi(List ids)});
+      String this.single(int id),
+      String this.multi(List<int> ids)});
 
-  String singleLocationToCssColor(var id) => single != null ? single(id) : null;
+  String singleLocationToCssColor(int id) => single != null ? single(id) : null;
 
-  String multiLocationToCssColor(List ids) => multi != null ? multi(ids) : null;
+  String multiLocationToCssColor(List<int> ids) =>
+      multi != null ? multi(ids) : null;
 }
 
 class PatternCssColorScheme implements CssColorScheme {
   const PatternCssColorScheme();
 
   bool get showLocationAsSpan => true;
 
   String singleLocationToCssColor(int index) {
     return "background:${toPattern(index)};";
   }
@@ skipping 76 matching lines @@
     return convertAnnotatedCodeToHtml(text, annotations,
         colorScheme: colorScheme,
         elementScheme: new HighlightLinkScheme(name),
         windowSize: 3);
   }
 }
 
 class ElementScheme {
   const ElementScheme();
 
-  String getName(var id, Set ids) => null;
-  String getHref(var id, Set ids) => null;
-  String onClick(var id, Set ids) => null;
-  String onMouseOver(var id, Set ids) => null;
-  String onMouseOut(var id, Set ids) => null;
+  String getName(int id, Set<int> ids) => null;
+  String getHref(int id, Set<int> ids) => null;
+  String onClick(int id, Set<int> ids) => null;
+  String onMouseOver(int id, Set<int> ids) => null;
+  String onMouseOut(int id, Set<int> ids) => null;
 }
 
 class HighlightLinkScheme implements ElementScheme {
   final String name;
 
   HighlightLinkScheme(this.name);
 
   @override
   String getName(int id, Set<int> indices) {
     return 'js$id';
@@ skipping 375 matching lines @@
       String dartCode = truncate(codePoint.dartCode, 50);
       buffer.write('<td class="code">${dartCode}</td>');
       buffer.write('<td>${escape(codePoint.sourceLocation.shortText)}</td>');
     }
     buffer.write('</tr>');
   });
   buffer.write('</table>');
 
   return buffer.toString();
 }