Show service worker navigation preload requests in DevTools Network tab

third_party/WebKit/Source/devtools/front_end/sdk/NetworkLog.js

 /*
  * Copyright (C) 2011 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 127 matching lines @@
           var topFrame = stack.callFrames.length ? stack.callFrames[0] : null;
           if (!topFrame)
             continue;
           type = SDK.NetworkRequest.InitiatorType.Script;
           url = topFrame.url || Common.UIString('<anonymous>');
           lineNumber = topFrame.lineNumber;
           columnNumber = topFrame.columnNumber;
           scriptId = topFrame.scriptId;
           break;
         }
+      } else if (initiator.type === Protocol.Network.InitiatorType.Preload) {
+        type = SDK.NetworkRequest.InitiatorType.Preload;
       }
     }
 
     request[SDK.NetworkLog._initiatorDataSymbol].info =
         {type: type, url: url, lineNumber: lineNumber, columnNumber: columnNumber, scriptId: scriptId};
     return request[SDK.NetworkLog._initiatorDataSymbol].info;
   }
 
   /**
    * @param {!SDK.NetworkRequest} request
@@ skipping 159 matching lines @@
 SDK.PageLoad._lastIdentifier = 0;
 
 /** @typedef {!{initiators: !Set<!SDK.NetworkRequest>, initiated: !Set<!SDK.NetworkRequest>}} */
 SDK.NetworkLog.InitiatorGraph;
 
 /** @typedef {!{type: !SDK.NetworkRequest.InitiatorType, url: string, lineNumber: number, columnNumber: number, scriptId: ?string}} */
 SDK.NetworkLog._InitiatorInfo;
 
 SDK.NetworkLog._initiatorDataSymbol = Symbol('InitiatorData');
 SDK.NetworkLog._pageLoadForRequestSymbol = Symbol('PageLoadForRequest');