Show service worker navigation preload requests in DevTools Network tab

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

Index: third_party/WebKit/Source/devtools/front_end/sdk/NetworkRequest.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/NetworkRequest.js b/third_party/WebKit/Source/devtools/front_end/sdk/NetworkRequest.js
index 1a92cface00bf3d516148439bb774c903a7623a3..6f226c77a93ee487c80221c0b4455e5f7a1de993 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/NetworkRequest.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/NetworkRequest.js
@@ -1080,6 +1080,8 @@ SDK.NetworkRequest = class extends SDK.SDKObject {
           scriptId = topFrame.scriptId;
           break;
         }
+      } else if (initiator.type === Protocol.Network.InitiatorType.Preload) {
+        type = SDK.NetworkRequest.InitiatorType.Preload;
       }
     }
 
@@ -1225,7 +1227,8 @@ SDK.NetworkRequest.InitiatorType = {
   Other: 'other',
   Parser: 'parser',
   Redirect: 'redirect',
-  Script: 'script'
+  Script: 'script',
+  Preload: 'preload'
 };
 
 /** @typedef {!{name: string, value: string}} */