Show service worker navigation preload requests in DevTools Network tab.

content/browser/devtools/service_worker_devtools_agent_host.h

Index: content/browser/devtools/service_worker_devtools_agent_host.h
diff --git a/content/browser/devtools/service_worker_devtools_agent_host.h b/content/browser/devtools/service_worker_devtools_agent_host.h
index 7fac848938fecbb664d31979f479f4701455e7c3..a4fd5f8b4650f8b191225f51d79d46b845e01298 100644
--- a/content/browser/devtools/service_worker_devtools_agent_host.h
+++ b/content/browser/devtools/service_worker_devtools_agent_host.h
@@ -16,6 +16,10 @@
 
 namespace content {
 
+struct ResourceRequest;
+struct ResourceResponseHead;
+struct ResourceRequestCompletionStatus;
+
 class ServiceWorkerDevToolsAgentHost : public WorkerDevToolsAgentHost {
  public:
   using List = std::vector<scoped_refptr<ServiceWorkerDevToolsAgentHost>>;
@@ -44,6 +48,15 @@ class ServiceWorkerDevToolsAgentHost : public WorkerDevToolsAgentHost {
   void WorkerVersionInstalled();
   void WorkerVersionDoomed();
 
+  void NavigationPreloadRequestSent(const std::string& request_id,
+                                    const ResourceRequest& request);
+  void NavigationPreloadResponseReceived(const std::string& request_id,
+                                         const GURL& url,
+                                         const ResourceResponseHead& head);
+  void NavigationPreloadCompleted(
+      const std::string& request_id,
+      const ResourceRequestCompletionStatus& completion_status);
+
   int64_t service_worker_version_id() const;
   GURL scope() const;