DevTools: [timeline tree view] expose human-readable names for chrome extensions

Source/devtools/front_end/timeline/TimelineTreeView.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.
 
 /**
  * @constructor
  * @extends {WebInspector.VBox}
  * @param {!WebInspector.TimelineModel} model
  */
 WebInspector.TimelineTreeView = function(model)
@@ skipping 165 matching lines @@
         /**
          * @param {!WebInspector.TimelineModel.ProfileTreeNode} node
          * @return {string}
          */
         function groupByURL(node)
         {
             return WebInspector.TimelineTreeView.eventURL(node.event) || "";
         }
 
         /**
+         * @param {boolean} groupSubdomains
          * @param {!WebInspector.TimelineModel.ProfileTreeNode} node
          * @return {string}
          */
-        function groupByDomain(node)
-        {
-            var parsedURL = (WebInspector.TimelineTreeView.eventURL(node.event) || "").asParsedURL();
-            return parsedURL && parsedURL.host || "";
-        }
-
-        /**
-         * @param {!WebInspector.TimelineModel.ProfileTreeNode} node
-         * @return {string}
-         */
-        function groupByDomainSecondLevel(node)
+        function groupByDomain(groupSubdomains, node)
         {
             var parsedURL = (WebInspector.TimelineTreeView.eventURL(node.event) || "").asParsedURL();
             if (!parsedURL)
                 return "";
+            if (parsedURL.scheme === "chrome-extension") {
+                var url = parsedURL.scheme + "://" + parsedURL.host;
+                var displayName = executionContextNamesByOrigin.get(url);
+                return displayName ? WebInspector.UIString("Chrome Extension: %s", displayName) : url;
+            }
+            if (!groupSubdomains)
+                return parsedURL.host;
             if (/^[.0-9]+$/.test(parsedURL.host))
                 return parsedURL.host;
             var domainMatch = /([^.]*\.)?[^.]*$/.exec(parsedURL.host);
             return domainMatch && domainMatch[0] || "";
         }
 
+        var executionContextNamesByOrigin = new Map();
+        var mainTarget = WebInspector.targetManager.mainTarget();
+        if (mainTarget) {
+            for (var context of mainTarget.runtimeModel.executionContexts())
+                executionContextNamesByOrigin.set(context.origin, context.name);
+        }
         var groupByMap = /** @type {!Map<!WebInspector.TimelineTreeView.GroupBy,?function(!WebInspector.TimelineModel.ProfileTreeNode):string>} */ (new Map([
             [WebInspector.TimelineTreeView.GroupBy.None, null],
-            [WebInspector.TimelineTreeView.GroupBy.Domain, groupByDomain],
-            [WebInspector.TimelineTreeView.GroupBy.DomainSecondLevel, groupByDomainSecondLevel],
+            [WebInspector.TimelineTreeView.GroupBy.Domain, groupByDomain.bind(null, false)],
+            [WebInspector.TimelineTreeView.GroupBy.DomainSecondLevel, groupByDomain.bind(null, true)],
             [WebInspector.TimelineTreeView.GroupBy.URL, groupByURL]
         ]));
         return groupByMap.get(this._groupBySetting.get()) || null;
     },
 
     /**
      * @param {function(!WebInspector.TimelineModel.ProfileTreeNode):string} nodeToGroupId
      * @param {!WebInspector.TimelineModel.ProfileTreeNode} node
      * @return {!WebInspector.TimelineModel.ProfileTreeNode}
      */
@@ skipping 186 matching lines @@
         if (!this._profileNode.children)
             return;
         for (var node of this._profileNode.children.values()) {
             var gridNode = new WebInspector.TimelineTreeView.GridNode(node, this._totalTime, this._maxTimes.self, this._maxTimes.total);
             this.insertChildOrdered(gridNode);
         }
     },
 
     __proto__: WebInspector.SortableDataGridNode.prototype
 }