DevTools: Fix url assignment when renaming files in workspace

Source/devtools/front_end/sdk/FileSystemWorkspaceBinding.js

Index: Source/devtools/front_end/sdk/FileSystemWorkspaceBinding.js
diff --git a/Source/devtools/front_end/sdk/FileSystemWorkspaceBinding.js b/Source/devtools/front_end/sdk/FileSystemWorkspaceBinding.js
index e7bf68d15bd883e4fd6d783dcfad62c5669efbe0..7a7e217c0f25a72945b17777dd1cd22554a68875 100644
--- a/Source/devtools/front_end/sdk/FileSystemWorkspaceBinding.js
+++ b/Source/devtools/front_end/sdk/FileSystemWorkspaceBinding.js
@@ -322,6 +322,7 @@ WebInspector.FileSystemWorkspaceBinding.FileSystem.prototype = {
             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