Check the existence of each properties of ResourceDevToolsInfo for NavigationPreload

content/browser/devtools/protocol/network_handler.cc

 // Copyright 2014 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.
 
 #include "content/browser/devtools/protocol/network_handler.h"
 
 #include <stddef.h>
 
 #include "base/barrier_closure.h"
 #include "base/command_line.h"
@@ skipping 613 matching lines @@
           .SetConnectionReused(head.load_timing.socket_reused)
           .SetConnectionId(head.load_timing.socket_log_id)
           .SetSecurityState(securityState(url, head.cert_status))
           .SetEncodedDataLength(head.encoded_data_length)
           .SetTiming(getTiming(head.load_timing))
           .SetFromDiskCache(!head.load_timing.request_start_time.is_null() &&
                             head.response_time <
                                 head.load_timing.request_start_time)
           .Build());
   if (head.devtools_info) {
-    response->SetStatus(head.devtools_info->http_status_code);
-    response->SetStatusText(head.devtools_info->http_status_text);
-    response->SetRequestHeaders(
-        getHeaders(head.devtools_info->request_headers));
-    response->SetHeaders(getHeaders(head.devtools_info->response_headers));
-    response->SetHeadersText(head.devtools_info->response_headers_text);
+    if (head.devtools_info->http_status_code) {
+      response->SetStatus(head.devtools_info->http_status_code);
+      response->SetStatusText(head.devtools_info->http_status_text);
+    }
+    if (head.devtools_info->request_headers.size()) {
+      response->SetRequestHeaders(
+          getHeaders(head.devtools_info->request_headers));
+    }
+    if (!head.devtools_info->request_headers_text.empty()) {
+      response->SetRequestHeadersText(
+          head.devtools_info->request_headers_text);
+    }
+    if (head.devtools_info->response_headers.size())
+      response->SetHeaders(getHeaders(head.devtools_info->response_headers));
+    if (!head.devtools_info->response_headers_text.empty())
+      response->SetHeadersText(head.devtools_info->response_headers_text);
   }
   response->SetProtocol(getProtocol(url, head));
   response->SetRemoteIPAddress(head.socket_address.HostForURL());
   response->SetRemotePort(head.socket_address.port());
   frontend_->ResponseReceived(
       request_id, version_id /* frameId */, version_id /* loaderId */,
       base::TimeTicks::Now().ToInternalValue() /
           static_cast<double>(base::Time::kMicrosecondsPerSecond),
       Page::ResourceTypeEnum::Other, std::move(response));
 }
@@ skipping 15 matching lines @@
                       static_cast<double>(base::Time::kMicrosecondsPerSecond),
       completion_status.encoded_data_length);
 }
 
 std::string NetworkHandler::UserAgentOverride() const {
   return enabled_ ? user_agent_ : std::string();
 }
 
 }  // namespace protocol
 }  // namespace content