[Devtools] Cleanup DataGrid's typecast and identifier naming

third_party/WebKit/Source/devtools/front_end/resources/IndexedDBViews.js

 /*
  * Copyright (C) 2012 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 105 matching lines @@
 }
 
 WebInspector.IDBDataView.prototype = {
     /**
      * @return {!WebInspector.DataGrid}
      */
     _createDataGrid: function()
     {
         var keyPath = this._isIndex ? this._index.keyPath : this._objectStore.keyPath;
 
-        var columns = [];
-        columns.push({id: "number", title: WebInspector.UIString("#"), width: "50px"});
-        columns.push({id: "key", titleDOMFragment: this._keyColumnHeaderFragment(WebInspector.UIString("Key"), keyPath)});
+        var columns = /** @type {!Array<!WebInspector.DataGrid.ColumnDescriptor>} */ ([]);
+        columns.push({id: "number", title: WebInspector.UIString("#"), sortable: false, width: "50px"});
+        columns.push({id: "key", titleDOMFragment: this._keyColumnHeaderFragment(WebInspector.UIString("Key"), keyPath), sortable: false});
         if (this._isIndex)
-            columns.push({id: "primaryKey", titleDOMFragment: this._keyColumnHeaderFragment(WebInspector.UIString("Primary key"), this._objectStore.keyPath)});
-        columns.push({id: "value", title: WebInspector.UIString("Value")});
+            columns.push({id: "primaryKey", titleDOMFragment: this._keyColumnHeaderFragment(WebInspector.UIString("Primary key"), this._objectStore.keyPath), sortable: false});
+        columns.push({id: "value", title: WebInspector.UIString("Value"), sortable: false});
 
         var dataGrid = new WebInspector.DataGrid(columns);
         return dataGrid;
     },
 
     /**
      * @param {string} prefix
      * @param {*} keyPath
      * @return {!DocumentFragment}
      */
@@ skipping 225 matching lines @@
             cell.appendChild(objectElement);
             break;
         default:
         }
 
         return cell;
     },
 
     __proto__: WebInspector.DataGridNode.prototype
 }