Issue 16417. Use better implemention for converting paths to resources.

editor/tools/plugins/com.google.dart.tools.debug.core/src/com/google/dart/tools/debug/core/source/WorkspaceSourceContainer.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 32 matching lines @@
       return (IFile) resource;
     } else {
       return null;
     }
   }
 
   public static IResource locatePathAsResource(String path) {
     if (path == null) {
       return null;
     }
+    File file = new File(path);
 
     // Look for a resource reference (/project/directory/file.dart).
-    IResource resource = ResourcesPlugin.getWorkspace().getRoot().findMember(path);
-
+    IResource resource = ResourceUtil.getResource(file);
     if (resource != null) {
       return resource;
     }
 
     // Look for something which could potentially resolve to a resource in the workspace.
     resource = findPotentialWorkspaceMatch(path);
-
     if (resource != null) {
       return resource;
     }
 
     // Look for a file system reference.
-    File file = new File(path);
-
     if (file.exists() && !file.isDirectory()) {
       IFile[] files = ResourcesPlugin.getWorkspace().getRoot().findFilesForLocationURI(file.toURI());
 
       if (files.length > 0) {
         return files[0];
       }
 
       // look for file among all resources, no filtering
       resource = ResourceUtil.getFile(file);
 
@@ skipping 42 matching lines @@
   public String getName() {
     return "Workspace";
   }
 
   @Override
   public ISourceContainerType getType() {
     return getSourceContainerType(TYPE_ID);
   }
 
 }