DevTools: Improve performance of the element breadcrumbs.

Source/devtools/front_end/DOMAgent.js

Index: Source/devtools/front_end/DOMAgent.js
diff --git a/Source/devtools/front_end/DOMAgent.js b/Source/devtools/front_end/DOMAgent.js
index 63abcf43cdedfc98fb726d734dcf0c41c42d4648..3f948b9ce6eb7103d79cd119924fcc4fc391067d 100644
--- a/Source/devtools/front_end/DOMAgent.js
+++ b/Source/devtools/front_end/DOMAgent.js
@@ -364,7 +364,7 @@ WebInspector.DOMNode.prototype = {
     },
 
     /**
-     * @param {function(?Protocol.Error)=} callback
+     * @param {function(?Protocol.Error, DOMAgent.NodeId=)=} callback
      */
     removeNode: function(callback)
     {
@@ -596,7 +596,7 @@ WebInspector.DOMNode.prototype = {
     /**
      * @param {WebInspector.DOMNode} targetNode
      * @param {?WebInspector.DOMNode} anchorNode
-     * @param {function(?Protocol.Error)=} callback
+     * @param {function(?Protocol.Error, DOMAgent.NodeId=)=} callback
      */
     moveTo: function(targetNode, anchorNode, callback)
     {
@@ -830,9 +830,11 @@ WebInspector.DOMDocument.prototype = {
  * @constructor
  */
 WebInspector.DOMAgent = function() {
-    /** @type {Object|undefined} */
+    /** @type {!Object.<number, !WebInspector.DOMNode>} */
     this._idToDOMNode = {};
+    /** @type {?WebInspector.DOMDocument} */
     this._document = null;
+    /** @type {!Object.<number, boolean>} */
     this._attributeLoadNodeIds = {};
     InspectorBackend.registerDOMDispatcher(new WebInspector.DOMDispatcher(this));
 }
@@ -1349,8 +1351,9 @@ WebInspector.DOMAgent.prototype = {
 
     /**
      * @param {WebInspector.DOMNode} node
-     * @param {function(?Protocol.Error)=} callback
-     * @return {function(?Protocol.Error)}
+     * @param {function(?Protocol.Error, A=, B=)=} callback
+     * @return {function(?Protocol.Error, A=, B=)}
+     * @template A,B
      */
     _markRevision: function(node, callback)
     {