DevTools: use shorthand syntax in interface definitions.

third_party/WebKit/Source/devtools/front_end/layer_viewer/LayerViewHost.js

 /*
  * Copyright 2015 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 /**
  * @interface
  */
 LayerViewer.LayerView = function() {};
 
 LayerViewer.LayerView.prototype = {
   /**
    * @param {?LayerViewer.LayerView.Selection} selection
    */
-  hoverObject: function(selection) {},
+  hoverObject(selection) {},
 
   /**
    * @param {?LayerViewer.LayerView.Selection} selection
    */
-  selectObject: function(selection) {},
+  selectObject(selection) {},
 
   /**
    * @param {?SDK.LayerTreeBase} layerTree
    */
-  setLayerTree: function(layerTree) {}
+  setLayerTree(layerTree) {}
 };
 
 /**
  * @unrestricted
  */
 LayerViewer.LayerView.Selection = class {
   /**
    * @param {!LayerViewer.LayerView.Selection.Type} type
    * @param {!SDK.Layer} layer
    */
@@ skipping 215 matching lines @@
    * @param {?SDK.DOMNode} node
    */
   _toggleNodeHighlight(node) {
     if (node) {
       node.highlightForTwoSeconds();
       return;
     }
     SDK.DOMModel.hideDOMNodeHighlight();
   }
 };