some fixes for --strong warnings

lib/src/codegen/code_generator.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.
 
 library dev_compiler.src.codegen.code_generator;
 
 import 'package:analyzer/src/generated/element.dart'
     show CompilationUnitElement, LibraryElement;
 import 'package:analyzer/src/generated/engine.dart' show AnalysisContext;
 import 'package:path/path.dart' as path;
@@ skipping 33 matching lines @@
     list.add(_dirToPrefix(path.current));
     // Sort by reverse length to prefer longer prefixes.
     // This ensures that we get the minimum valid suffix.  E.g., if we have:
     // - root/
     // - root/generated/
     // in our search path, and the path "root/generated/foo/bar.dart", we'll
     // compute "foo/bar.dart" instead of "generated/foo/bar.dart" in the search
     // below.
     list.sort((s1, s2) => s2.length - s1.length);
     return list;
-  }();
+  }() as List<String>;

[Leaf, 2015/07/22 22:29:15]

This shouldn't be necessary, but currently is.  I need to fix this.

 
   static String _dirToPrefix(String dir) {
     dir = path.absolute(dir);
     dir = path.normalize(dir);
     if (!dir.endsWith(path.separator)) {
       dir = dir + path.separator;
     }
     return dir;
   }
 
@@ skipping 55 matching lines @@
       // Not a package.
       // TODO(leafp) These may need to be adjusted
       // relative to the import location
       return new Uri(path: suffix);
     }
     assert(index == 0);
     return new Uri(
         scheme: 'package', path: path.joinAll(parts.sublist(index + 1)));
   }
 }