[Not for review] record detailed time breakdown of SW related requests.

content/child/resource_dispatcher.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/child/resource_dispatcher.h"
 
 #include <utility>
 
@@ skipping 162 matching lines @@
     return;
   request_info->response_start = ConsumeIOTimestamp();
 
   if (delegate_) {
     std::unique_ptr<RequestPeer> new_peer = delegate_->OnReceivedResponse(
         std::move(request_info->peer), response_head.mime_type,
         request_info->url);
     DCHECK(new_peer);
     request_info->peer = std::move(new_peer);
   }
-
   ResourceResponseInfo renderer_response_info;
   ToResourceResponseInfo(*request_info, response_head, &renderer_response_info);
   request_info->site_isolation_metadata =
       SiteIsolationStatsGatherer::OnReceivedResponse(
           request_info->frame_origin, request_info->response_url,
           request_info->resource_type, request_info->origin_pid,
           renderer_response_info);
+  renderer_response_info.response_start = response_head.response_start;
   request_info->peer->OnReceivedResponse(renderer_response_info);
 }
 
 void ResourceDispatcher::OnReceivedCachedMetadata(
       int request_id, const std::vector<char>& data) {
   PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
   if (!request_info)
     return;
 
   if (data.size())
@@ skipping 460 matching lines @@
   // Compute a unique request_id for this renderer process.
   int request_id = MakeRequestID();
   pending_requests_[request_id] = base::MakeUnique<PendingRequestInfo>(
       std::move(peer), request->resource_type, request->origin_pid,
       frame_origin, request->url, request->download_to_file);
 
   if (resource_scheduling_filter_.get() && loading_task_runner) {
     resource_scheduling_filter_->SetRequestIdTaskRunner(request_id,
                                                         loading_task_runner);
   }
+  request->request_start = pending_requests_[request_id]->request_start;
 
   if (ipc_type == blink::WebURLRequest::LoadingIPCType::Mojo) {
     std::unique_ptr<URLLoaderClientImpl> client(
         new URLLoaderClientImpl(request_id, this, main_thread_task_runner_));
     mojom::URLLoaderAssociatedPtr url_loader;
     mojom::URLLoaderClientAssociatedPtrInfo client_ptr_info;
     client->Bind(&client_ptr_info, associated_group);
     url_loader_factory->CreateLoaderAndStart(
         MakeRequest(&url_loader, associated_group), routing_id, request_id,
         *request, std::move(client_ptr_info));
@@ skipping 141 matching lines @@
     delete message;
   }
 }
 
 void ResourceDispatcher::SetResourceSchedulingFilter(
     scoped_refptr<ResourceSchedulingFilter> resource_scheduling_filter) {
   resource_scheduling_filter_ = resource_scheduling_filter;
 }
 
 }  // namespace content