remove dependency on compiler from resolution

pkg/compiler/lib/src/source_file_provider.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 source_file_provider;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 import 'dart:math' as math;
@@ skipping 150 matching lines @@
       case api.Diagnostic.INFO:
       case api.Diagnostic.VERBOSE_INFO:
         return 'Info: $message';
     }
     throw 'Unexpected diagnostic kind: $kind (${kind.ordinal})';
   }
 
   @override
   void report(var code, Uri uri, int begin, int end, String message,
       api.Diagnostic kind) {
-    // TODO(ahe): Remove this when source map is handled differently.
-    if (identical(kind.name, 'source map')) return;
-
     if (isAborting) return;
     isAborting = (kind == api.Diagnostic.CRASH);
 
     bool fatal = (kind.ordinal & FATAL) != 0;
     bool isInfo = (kind.ordinal & INFO) != 0;
     if (isInfo && uri == null && kind != api.Diagnostic.INFO) {
       info(message, kind);
       return;
     }
 
@@ skipping 157 matching lines @@
   var onAdd, onClose;
 
   EventSinkWrapper(this.onAdd, this.onClose);
 
   void add(String data) => onAdd(data);
 
   void addError(error, [StackTrace stackTrace]) => throw error;
 
   void close() => onClose();
 }