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

content/common/resource_request.h

 // Copyright 2016 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.
 
 #ifndef CONTENT_COMMON_RESOURCE_REQUEST_H_
 #define CONTENT_COMMON_RESOURCE_REQUEST_H_
 
 #include <stdint.h>
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/optional.h"
+#include "base/time/time.h"
 #include "content/common/content_export.h"
 #include "content/common/navigation_params.h"
 #include "content/common/resource_request_body_impl.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "content/public/common/appcache_info.h"
 #include "content/public/common/previews_state.h"
 #include "content/public/common/request_context_frame_type.h"
 #include "content/public/common/request_context_type.h"
 #include "content/public/common/resource_type.h"
 #include "net/base/request_priority.h"
@@ skipping 10 matching lines @@
   ResourceRequest();
   ResourceRequest(const ResourceRequest& request);
   ~ResourceRequest();
 
   // The request method: GET, POST, etc.
   std::string method;
 
   // The absolute requested URL encoded in ASCII per the rules of RFC-2396.
   GURL url;
 
+  // TimeTicks::Now() when the renderer sent the request to the browser.
+  base::TimeTicks request_start;
+
   // URL representing the first-party origin for the request, which may be
   // checked by the third-party cookie blocking policy. This is usually the URL
   // of the document in the top-level window. Leaving it empty may lead to
   // undesired cookie blocking. Third-party cookie blocking can be bypassed by
   // setting first_party_for_cookies = url, but this should ideally only be
   // done if there really is no way to determine the correct value.
   GURL first_party_for_cookies;
 
   // The origin of the context which initiated the request, which will be used
   // for cookie checks like 'First-Party-Only'.
@@ skipping 140 matching lines @@
   bool initiated_in_secure_context = false;
 
   // The response should be downloaded and stored in the network cache, but not
   // sent back to the renderer.
   bool download_to_network_cache_only = false;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_RESOURCE_REQUEST_H_