service worker: Add a netlog event for navigation preload

content/browser/loader/resource_dispatcher_host_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 
 #include <stddef.h>
 
@@ skipping 84 matching lines @@
 #include "net/base/load_flags.h"
 #include "net/base/mime_util.h"
 #include "net/base/net_errors.h"
 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
 #include "net/base/upload_data_stream.h"
 #include "net/cert/cert_status_flags.h"
 #include "net/cookies/cookie_monster.h"
 #include "net/http/http_request_headers.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_response_info.h"
+#include "net/log/net_log_with_source.h"
 #include "net/ssl/client_cert_store.h"
 #include "net/ssl/ssl_cert_request_info.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_job_factory.h"
 #include "ppapi/features/features.h"
 #include "storage/browser/blob/blob_data_handle.h"
 #include "storage/browser/blob/blob_storage_context.h"
 #include "storage/browser/blob/blob_url_request_job_factory.h"
 #include "storage/browser/blob/shareable_file_reference.h"
@@ skipping 1105 matching lines @@
                                request_id, std::move(url_loader_client));
     return;
   }
 
   // Construct the request.
   std::unique_ptr<net::URLRequest> new_request = request_context->CreateRequest(
       is_navigation_stream_request ? request_data.resource_body_stream_url
                                    : request_data.url,
       request_data.priority, nullptr);
 
+  // Log that this request is a service worker navigation preload request here,
+  // since navigation preload machinery has no access to netlog.
+  // TODO(falken): Figure out how mojom::URLLoaderClient can
+  // access the request's netlog.
+  if (requester_info->IsNavigationPreload()) {
+    new_request->net_log().AddEvent(
+        net::NetLogEventType::SERVICE_WORKER_NAVIGATION_PRELOAD_REQUEST);
+  }
+
   // PlzNavigate: Always set the method to GET when gaining access to the
   // stream that contains the response body of a navigation. Otherwise the data
   // that was already fetched by the browser will not be transmitted to the
   // renderer.
   if (is_navigation_stream_request)
     new_request->set_method("GET");
   else
     new_request->set_method(request_data.method);
 
   new_request->set_first_party_for_cookies(
@@ skipping 1377 matching lines @@
                                  &throttles);
     if (!throttles.empty()) {
       handler.reset(new ThrottlingResourceHandler(std::move(handler), request,
                                                   std::move(throttles)));
     }
   }
   return handler;
 }
 
 }  // namespace content