Package-ify Dromaeo and browser controller functionality

samples/third_party/dromaeo/web/Suites.dart

 library Suites;
 
 class Origin {
   final String author;
   final String url;
 
   const Origin(this.author, this.url);
 }
 
 class SuiteDescription {
@@ skipping 72 matching lines @@
     if (lib != '') {
       lib = '-$lib';
     }
     switch (platform) {
       case 'js':
       case 'dart':
         return path.replaceFirst('.html', '$lib.html');
       case 'dart2js':
         int i = path.indexOf('/');
         String topLevelDir = '';
-        if (i != -1) topLevelDir = '${path.substring(0, i)}/';
-        return '$topLevelDir$platform/'
+        if (i != -1) topLevelDir = '${path.substring(0, i)}';
+        return '$topLevelDir/'
             '${path.substring(i + 1).replaceFirst(".html", "$lib-js.html")}';
     }
   }
 
   static var _SUITE_DESCRIPTIONS;
 
   static List<SuiteDescription> get SUITE_DESCRIPTIONS {
     if (_SUITE_DESCRIPTIONS != null) {
       return _SUITE_DESCRIPTIONS;
     }
@@ skipping 60 matching lines @@
       return CATEGORIES[tags];
     }
     for (final suite in _CORE_SUITE_DESCRIPTIONS) {
       if (suite.tags[0] == tags) {
         return suite.name;
       }
     }
     return null;
   }
 }