Show service worker navigation preload requests in DevTools Network tab.

content/browser/devtools/protocol/network_handler.h

Index: content/browser/devtools/protocol/network_handler.h
diff --git a/content/browser/devtools/protocol/network_handler.h b/content/browser/devtools/protocol/network_handler.h
index 76e8f9761bb52024955a3a2131b3a4872022f756..2ce9dcb1c3d698b12acc21478b1969e0429c26bf 100644
--- a/content/browser/devtools/protocol/network_handler.h
+++ b/content/browser/devtools/protocol/network_handler.h
@@ -5,6 +5,8 @@
 #ifndef CONTENT_BROWSER_DEVTOOLS_PROTOCOL_NETWORK_HANDLER_H_
 #define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_NETWORK_HANDLER_H_
 
+#include <memory>
+
 #include "base/macros.h"
 #include "content/browser/devtools/protocol/devtools_domain_handler.h"
 #include "content/browser/devtools/protocol/network.h"
@@ -14,6 +16,9 @@ namespace content {
 
 class DevToolsSession;
 class RenderFrameHostImpl;
+struct ResourceRequest;
+struct ResourceRequestCompletionStatus;
+struct ResourceResponseHead;
 
 namespace protocol {
 
@@ -56,10 +61,22 @@ class NetworkHandler : public DevToolsDomainHandler,
   Response SetUserAgentOverride(const std::string& user_agent) override;
   Response CanEmulateNetworkConditions(bool* result) override;
 
+  void NavigationPreloadRequestSent(int worker_version_id,
+                                    const std::string& request_id,
+                                    const ResourceRequest& request);
+  void NavigationPreloadResponseReceived(int worker_version_id,
+                                         const std::string& request_id,
+                                         const GURL& url,
+                                         const ResourceResponseHead& head);
+  void NavigationPreloadCompleted(
+      const std::string& request_id,
+      const ResourceRequestCompletionStatus& completion_status);
+
   bool enabled() const { return enabled_; }
   std::string UserAgentOverride() const;
 
  private:
+  std::unique_ptr<Network::Frontend> frontend_;
   RenderFrameHostImpl* host_;
   bool enabled_;
   std::string user_agent_;