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

Index: editor/tools/plugins/com.google.dart.tools.debug.core/src/com/google/dart/tools/debug/core/source/WorkspaceSourceContainer.java
diff --git a/editor/tools/plugins/com.google.dart.tools.debug.core/src/com/google/dart/tools/debug/core/source/WorkspaceSourceContainer.java b/editor/tools/plugins/com.google.dart.tools.debug.core/src/com/google/dart/tools/debug/core/source/WorkspaceSourceContainer.java
index 855600fee1333c7b895f8433bccea5400891113a..29543885d3c421a959d12f565b4bf36a152f0be2 100644
--- a/editor/tools/plugins/com.google.dart.tools.debug.core/src/com/google/dart/tools/debug/core/source/WorkspaceSourceContainer.java
+++ b/editor/tools/plugins/com.google.dart.tools.debug.core/src/com/google/dart/tools/debug/core/source/WorkspaceSourceContainer.java
@@ -50,24 +50,21 @@ public class WorkspaceSourceContainer extends AbstractSourceContainer {
     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());