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

content/common/resource_messages.h

 // 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.
 
 // IPC messages for resource loading.
 //
 // NOTE: All messages must send an |int request_id| as their first parameter.
 
 // Multiply-included message file, hence no include guard.
 
@@ skipping 196 matching lines @@
 IPC_STRUCT_TRAITS_BEGIN(net::SignedCertificateTimestampAndStatus)
   IPC_STRUCT_TRAITS_MEMBER(sct)
   IPC_STRUCT_TRAITS_MEMBER(status)
 IPC_STRUCT_TRAITS_END()
 
 IPC_ENUM_TRAITS_MAX_VALUE(net::ct::SCTVerifyStatus, net::ct::SCT_STATUS_MAX)
 
 IPC_STRUCT_TRAITS_BEGIN(content::ResourceRequest)
   IPC_STRUCT_TRAITS_MEMBER(method)
   IPC_STRUCT_TRAITS_MEMBER(url)
+  IPC_STRUCT_TRAITS_MEMBER(request_start)
   IPC_STRUCT_TRAITS_MEMBER(first_party_for_cookies)
   IPC_STRUCT_TRAITS_MEMBER(request_initiator)
   IPC_STRUCT_TRAITS_MEMBER(referrer)
   IPC_STRUCT_TRAITS_MEMBER(referrer_policy)
   IPC_STRUCT_TRAITS_MEMBER(visibility_state)
   IPC_STRUCT_TRAITS_MEMBER(headers)
   IPC_STRUCT_TRAITS_MEMBER(load_flags)
   IPC_STRUCT_TRAITS_MEMBER(origin_pid)
   IPC_STRUCT_TRAITS_MEMBER(resource_type)
   IPC_STRUCT_TRAITS_MEMBER(priority)
@@ skipping 149 matching lines @@
 
 // Sent when the renderer process deletes a resource loader.
 IPC_MESSAGE_CONTROL1(ResourceHostMsg_ReleaseDownloadedFile,
                      int /* request_id */)
 
 // Sent by the renderer when a resource request changes priority.
 IPC_MESSAGE_CONTROL3(ResourceHostMsg_DidChangePriority,
                      int /* request_id */,
                      net::RequestPriority,
                      int /* intra_priority_value */)