DevTools: Fix url assignment when renaming files in workspace

Source/devtools/front_end/sdk/FileSystemWorkspaceBinding.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 304 matching lines @@
         {
             if (!success) {
                 callback(false, newName);
                 return;
             }
             var validNewName = /** @type {string} */ (newName);
             console.assert(validNewName);
             var slash = filePath.lastIndexOf("/");
             var parentPath = filePath.substring(0, slash);
             filePath = parentPath + "/" + validNewName;
+            filePath = filePath.substr(1);
             var newURL = this._workspace.urlForPath(this._fileSystem.path(), filePath);
             var extension = this._extensionForPath(validNewName);
             var newOriginURL = this._fileSystemURL + filePath
             var newContentType = this._contentTypeForExtension(extension);
             callback(true, validNewName, newURL, newOriginURL, newContentType);
         }
     },
 
     /**
      * @param {string} path
@@ skipping 247 matching lines @@
     dispose: function()
     {
         this._workspace.removeProject(this._projectId);
     }
 }
 
 /**
  * @type {!WebInspector.FileSystemWorkspaceBinding}
  */
 WebInspector.fileSystemWorkspaceBinding;