Remove dead DocumentState metrics tracking code

content/browser/frame_host/navigation_request.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/frame_host/navigation_request.h"
 
 #include <utility>
 
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/devtools/render_frame_devtools_agent_host.h"
@@ skipping 169 matching lines @@
   // TODO(clamy): Check if some PageState should be provided here.
   // TODO(clamy): See how we should handle override of the user agent when the
   // navigation may start in a renderer and commit in another one.
   // TODO(clamy): See if the navigation start time should be measured in the
   // renderer and sent to the browser instead of being measured here.
   // TODO(clamy): The pending history list offset should be properly set.
   RequestNavigationParams request_params(
       false,                   // is_overriding_user_agent
       std::vector<GURL>(),     // redirects
       false,                   // can_load_local_resources
-      base::Time::Now(),       // request_time
       PageState(),             // page_state
       0,                       // nav_entry_id
       false,                   // is_same_document_history_load
       false,                   // is_history_navigation_in_new_child
       std::map<std::string, bool>(), // subframe_unique_names
       frame_tree_node->has_committed_real_load(),
       false,                   // intended_as_new_entry
       -1,                      // pending_history_list_offset
       current_history_list_offset, current_history_list_length,
       false,                   // is_view_source
@@ skipping 389 matching lines @@
   DCHECK_EQ(request_params_.has_user_gesture, begin_params_.has_user_gesture);
 
   render_frame_host->CommitNavigation(response_.get(), std::move(body_),
                                       common_params_, request_params_,
                                       is_view_source_);
 
   frame_tree_node_->ResetNavigationRequest(true);
 }
 
 }  // namespace content