DevTools: do not allow using 'this' before call into super.

third_party/WebKit/Source/devtools/front_end/bindings/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 174 matching lines @@
 /**
  * @constructor
  * @extends {WebInspector.ProjectStore}
  * @implements {WebInspector.Project}
  * @param {!WebInspector.FileSystemWorkspaceBinding} fileSystemWorkspaceBinding
  * @param {!WebInspector.IsolatedFileSystem} isolatedFileSystem
  * @param {!WebInspector.Workspace} workspace
  */
 WebInspector.FileSystemWorkspaceBinding.FileSystem = function(fileSystemWorkspaceBinding, isolatedFileSystem, workspace)
 {
-    this._fileSystemWorkspaceBinding = fileSystemWorkspaceBinding;
+    var fileSystemPath = isolatedFileSystem.path();
+    var id = WebInspector.FileSystemWorkspaceBinding.projectId(fileSystemPath);
+    console.assert(!workspace.project(id));
+    var displayName = fileSystemPath.substr(fileSystemPath.lastIndexOf("/") + 1);
+
+    WebInspector.ProjectStore.call(this, workspace, id, WebInspector.projectTypes.FileSystem, displayName);
+
     this._fileSystem = isolatedFileSystem;
     this._fileSystemBaseURL = this._fileSystem.path() + "/";
-    this._fileSystemPath = this._fileSystem.path();
-
-    var id = WebInspector.FileSystemWorkspaceBinding.projectId(this._fileSystemPath);
-    console.assert(!workspace.project(id));
-
-    var displayName = this._fileSystemPath.substr(this._fileSystemPath.lastIndexOf("/") + 1);
-    WebInspector.ProjectStore.call(this, workspace, id, WebInspector.projectTypes.FileSystem, displayName);
+    this._fileSystemWorkspaceBinding = fileSystemWorkspaceBinding;
+    this._fileSystemPath = fileSystemPath;
 
     workspace.addProject(this);
     this.populate();
 };
 
 WebInspector.FileSystemWorkspaceBinding._metadata = Symbol("FileSystemWorkspaceBinding.Metadata");
 
 WebInspector.FileSystemWorkspaceBinding.FileSystem.prototype = {
     /**
      * @return {string}
@@ skipping 358 matching lines @@
         uiSourceCode.checkContentUpdated();
     },
 
     dispose: function()
     {
         this.removeProject();
     },
 
     __proto__: WebInspector.ProjectStore.prototype
 };