[Devtools] Removed NetworkRequest dependency on NetworkManager

third_party/WebKit/Source/devtools/front_end/network/NetworkLogViewColumns.js

 // Copyright 2016 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.
 /**
  * @unrestricted
  */
 Network.NetworkLogViewColumns = class {
   /**
    * @param {!Network.NetworkLogView} networkLogView
    * @param {!Network.NetworkTransferTimeCalculator} timeCalculator
@@ skipping 524 matching lines @@
     var anchor = event.target.enclosingNodeOrSelfWithClass('network-script-initiated');
     if (!anchor)
       return null;
     var request = hoveredNode.request();
     var initiator = request ? request.initiator() : null;
     if (!initiator || !initiator.stack)
       return null;
     return {
       box: anchor.boxInWindow(),
       show: popover => {
+        var manager = anchor.request ? SDK.NetworkManager.forRequest(anchor.request) : null;
         var content = Components.DOMPresentationUtils.buildStackTracePreviewContents(
-            anchor.request.networkManager().target(), this._popupLinkifier, initiator.stack);
+            manager ? manager.target() : null, this._popupLinkifier, initiator.stack);
         popover.contentElement.appendChild(content);
         return Promise.resolve(true);
       },
       hide: this._popupLinkifier.reset.bind(this._popupLinkifier)
     };
   }
 
   /**
    * @param {!Array<number>} times
    * @param {string} className
@@ skipping 246 matching lines @@
 /**
  * @enum {string}
  */
 Network.NetworkLogViewColumns.WaterfallSortIds = {
   StartTime: 'startTime',
   ResponseTime: 'responseReceivedTime',
   EndTime: 'endTime',
   Duration: 'duration',
   Latency: 'latency'
 };