Show service worker navigation preload requests in DevTools Network tab

third_party/WebKit/Source/core/inspector/browser_protocol.json

Index: third_party/WebKit/Source/core/inspector/browser_protocol.json
diff --git a/third_party/WebKit/Source/core/inspector/browser_protocol.json b/third_party/WebKit/Source/core/inspector/browser_protocol.json
index ee61904d0623f42ee37aed7cbec0ef15cc83a6b2..17bf15676566313b5da01e82baf3075d790d21a3 100644
--- a/third_party/WebKit/Source/core/inspector/browser_protocol.json
+++ b/third_party/WebKit/Source/core/inspector/browser_protocol.json
@@ -1110,7 +1110,7 @@
                 "type": "object",
                 "description": "Information about the request initiator.",
                 "properties": [
-                    { "name": "type", "type": "string", "enum": ["parser", "script", "other"], "description": "Type of this initiator." },
+                    { "name": "type", "type": "string", "enum": ["parser", "script", "preload", "other"], "description": "Type of this initiator." },
                     { "name": "stack", "$ref": "Runtime.StackTrace", "optional": true, "description": "Initiator JavaScript stack trace, set for Script only." },
                     { "name": "url", "type": "string", "optional": true, "description": "Initiator URL, set for Parser type only." },
                     { "name": "lineNumber", "type": "number", "optional": true, "description": "Initiator line number, set for Parser type only (0-based)." }
@@ -1484,6 +1484,47 @@
                     { "name": "data", "type": "string", "description": "Message content." }
                 ],
                 "experimental": true
+            },
+            {
+                "name": "navigationPreloadSent",
+                "description": "Fired when FetchEvent which has triggered a navigation preload request is received.",
+                "parameters": [
+                    { "name": "requestId", "$ref": "RequestId", "description": "Request identifier." },
+                    { "name": "url", "type": "string", "description": "Navigation preload request URL." },
+                    { "name": "timestamp", "$ref": "Timestamp", "description": "Timestamp." },
+                    { "name": "wallTime", "$ref": "Timestamp", "description": "UTC Timestamp." },
+                    { "name": "initiator", "$ref": "Initiator", "description": "Request initiator." }
+                ],
+                "experimental": true
+            },
+            {
+                "name": "navigationPreloadResponseReceived",
+                "description": "Fired when navigation preload response is available.",
+                "parameters": [
+                    { "name": "requestId", "$ref": "RequestId", "description": "Request identifier." },
+                    { "name": "timestamp", "$ref": "Timestamp", "description": "Timestamp." },
+                    { "name": "response", "$ref": "Response", "description": "Response data." }
+                ],
+                "experimental": true
+            },
+            {
+                "name": "navigationPreloadFailed",
+                "description": "Fired when navigation preload request has failed.",
+                "parameters": [
+                    { "name": "requestId", "$ref": "RequestId", "description": "Request identifier." },
+                    { "name": "timestamp", "$ref": "Timestamp", "description": "Timestamp." },
+                    { "name": "errorMessage", "type": "string", "description": "Error message." }
+                ],
+                "experimental": true
+            },
+            {
+                "name": "navigationPreloadFinished",
+                "description": "Fired when navigation preload request has finished loading.",
+                "parameters": [
+                    { "name": "requestId", "$ref": "RequestId", "description": "Request identifier." },
+                    { "name": "timestamp", "$ref": "Timestamp", "description": "Timestamp." }
+                ],
+                "experimental": true
             }
         ]
     },