Remove dead DocumentState metrics tracking code

content/common/navigation_params.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/common/navigation_params.h"
 
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "content/public/common/browser_side_navigation_policy.h"
@@ skipping 105 matching lines @@
 
 StartNavigationParams::StartNavigationParams(
     const StartNavigationParams& other) = default;
 
 StartNavigationParams::~StartNavigationParams() {
 }
 
 RequestNavigationParams::RequestNavigationParams()
     : is_overriding_user_agent(false),
       can_load_local_resources(false),
-      request_time(base::Time::Now()),
       nav_entry_id(0),
       is_same_document_history_load(false),
       is_history_navigation_in_new_child(false),
       has_committed_real_load(false),
       intended_as_new_entry(false),
       pending_history_list_offset(-1),
       current_history_list_offset(-1),
       current_history_list_length(0),
       is_view_source(false),
       should_clear_history_list(false),
       should_create_service_worker(false),
       service_worker_provider_id(kInvalidServiceWorkerProviderId),
       has_user_gesture(false) {}
 
 RequestNavigationParams::RequestNavigationParams(
     bool is_overriding_user_agent,
     const std::vector<GURL>& redirects,
     bool can_load_local_resources,
-    base::Time request_time,
     const PageState& page_state,
     int nav_entry_id,
     bool is_same_document_history_load,
     bool is_history_navigation_in_new_child,
     std::map<std::string, bool> subframe_unique_names,
     bool has_committed_real_load,
     bool intended_as_new_entry,
     int pending_history_list_offset,
     int current_history_list_offset,
     int current_history_list_length,
     bool is_view_source,
     bool should_clear_history_list,
     bool has_user_gesture)
     : is_overriding_user_agent(is_overriding_user_agent),
       redirects(redirects),
       can_load_local_resources(can_load_local_resources),
-      request_time(request_time),
       page_state(page_state),
       nav_entry_id(nav_entry_id),
       is_same_document_history_load(is_same_document_history_load),
       is_history_navigation_in_new_child(is_history_navigation_in_new_child),
       subframe_unique_names(subframe_unique_names),
       has_committed_real_load(has_committed_real_load),
       intended_as_new_entry(intended_as_new_entry),
       pending_history_list_offset(pending_history_list_offset),
       current_history_list_offset(current_history_list_offset),
       current_history_list_length(current_history_list_length),
@@ skipping 15 matching lines @@
     const RequestNavigationParams& request_params)
     : common_params(common_params),
       start_params(start_params),
       request_params(request_params) {
 }
 
 NavigationParams::~NavigationParams() {
 }
 
 }  // namespace content