DevTools: use timing information for "disk cached" resources.

Source/devtools/front_end/sdk/NetworkManager.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 189 matching lines @@
 
         networkRequest.connectionReused = response.connectionReused;
         networkRequest.connectionId = String(response.connectionId);
         if (response.remoteIPAddress)
             networkRequest.setRemoteAddress(response.remoteIPAddress, response.remotePort || -1);
 
         if (response.fromServiceWorker)
             networkRequest.fetchedViaServiceWorker = true;
 
         if (response.fromDiskCache)
-            networkRequest.cached = true;
-        else
-            networkRequest.timing = response.timing;
+            networkRequest.setFromDiskCache();
+        networkRequest.timing = response.timing;
 
         if (!this._mimeTypeIsConsistentWithType(networkRequest)) {
             var consoleModel = this._manager._target.consoleModel;
             consoleModel.addMessage(new WebInspector.ConsoleMessage(consoleModel.target(), WebInspector.ConsoleMessage.MessageSource.Network,
                 WebInspector.ConsoleMessage.MessageLevel.Log,
                 WebInspector.UIString("Resource interpreted as %s but transferred with MIME type %s: \"%s\".", networkRequest.type.title(), networkRequest.mimeType, networkRequest.url),
                 WebInspector.ConsoleMessage.MessageType.Log,
                 "",
                 0,
                 0,
@@ skipping 62 matching lines @@
 
     /**
      * @param {!NetworkAgent.RequestId} requestId
      */
     requestServedFromCache: function(requestId)
     {
         var networkRequest = this._inflightRequestsById[requestId];
         if (!networkRequest)
             return;
 
-        networkRequest.cached = true;
+        networkRequest.setFromMemoryCache();
     },
 
     /**
      * @param {!NetworkAgent.RequestId} requestId
      * @param {!PageAgent.FrameId} frameId
      * @param {!NetworkAgent.LoaderId} loaderId
      * @param {!NetworkAgent.Timestamp} time
      * @param {!PageAgent.ResourceType} resourceType
      * @param {!NetworkAgent.Response} response
      */
@@ skipping 260 matching lines @@
      * @param {!NetworkAgent.LoaderId} loaderId
      * @param {string} url
      * @param {string} documentURL
      * @param {?NetworkAgent.Initiator} initiator
      */
     _createNetworkRequest: function(requestId, frameId, loaderId, url, documentURL, initiator)
     {
         return new WebInspector.NetworkRequest(this._manager._target, requestId, url, documentURL, frameId, loaderId, initiator);
     }
 }