first incremental cut at editor without packages directories

editor/tools/plugins/com.google.dart.tools.search/src/com/google/dart/tools/search/ui/text/TextSearchScopeFilter.java

 /*
  * Copyright (c) 2012, the Dart project authors.
  * 
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  * 
  * http://www.eclipse.org/legal/epl-v10.html
  * 
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
@@ skipping 47 matching lines @@
   }
 
   /**
    * Test for files that are in the packages directory and linked to another resource in the
    * workspace.
    */
   public static boolean isSelfLinkedPackageResource(IResource resource) {
 
     IPath relativePath = resource.getProjectRelativePath();
 
-    if ("packages".equals(relativePath.segment(0))) {
+    if (DartCore.PACKAGES_DIRECTORY_NAME.equals(relativePath.segment(0))) {
 
       try {
 
         File canonicalFile = resource.getLocation().toFile().getCanonicalFile();
         IWorkspace workspace = ResourcesPlugin.getWorkspace();
         IPath loc = Path.fromOSString(canonicalFile.getAbsolutePath());
         IFile wsFile = workspace.getRoot().getFileForLocation(loc);
 
         if (wsFile != null && wsFile.exists()) {
           return true;
@@ skipping 38 matching lines @@
       return true;
     }
     if (fileName.endsWith(".dart.js")) {
       return true;
     }
 
     return DartCore.isImageLikeFileName(fileName);
   }
 
 }