Make PathFilter use the resource providers path context

pkg/analysis_server/lib/src/context_manager.dart

Index: pkg/analysis_server/lib/src/context_manager.dart
diff --git a/pkg/analysis_server/lib/src/context_manager.dart b/pkg/analysis_server/lib/src/context_manager.dart
index 78dcc69e79a8959c5684252d727ede6802d8d23d..dc86595eac66ea0a59fb8a462404b2108368eade 100644
--- a/pkg/analysis_server/lib/src/context_manager.dart
+++ b/pkg/analysis_server/lib/src/context_manager.dart
@@ -88,10 +88,12 @@ class ContextInfo {
    */
   Map<String, Source> sources = new HashMap<String, Source>();
 
-  ContextInfo(this.contextManager, this.parent, Folder folder,
+  ContextInfo(ContextManagerImpl contextManager, this.parent, Folder folder,
       File packagespecFile, this.packageRoot)
-      : folder = folder,
-        pathFilter = new PathFilter(folder.path, null) {
+      : contextManager = contextManager,
+        folder = folder,
+        pathFilter = new PathFilter(
+            contextManager.resourceProvider.pathContext, folder.path, null) {
     packageDescriptionPath = packagespecFile.path;
     parent.children.add(this);
   }