change navigation initiation type default value to RENDERER_INITIATED

ios/web/navigation/navigation_item_impl.mm

 // 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.
 
 #import "ios/web/navigation/navigation_item_impl.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
@@ skipping 27 matching lines @@
 }
 
 NavigationItemImpl::NavigationItemImpl()
     : unique_id_(GetUniqueIDInConstructor()),
       transition_type_(ui::PAGE_TRANSITION_LINK),
       is_overriding_user_agent_(false),
       is_created_from_push_state_(false),
       has_state_been_replaced_(false),
       is_created_from_hash_change_(false),
       should_skip_repost_form_confirmation_(false),
-      navigation_initiation_type_(
-          web::NavigationInitiationType::USER_INITIATED),
+      navigation_initiation_type_(web::NavigationInitiationType::NONE),
       is_unsafe_(false),
       facade_delegate_(nullptr) {}
 
 NavigationItemImpl::~NavigationItemImpl() {
 }
 
 NavigationItemImpl::NavigationItemImpl(const NavigationItemImpl& item)
     : unique_id_(item.unique_id_),
       original_request_url_(item.original_request_url_),
       url_(item.url_),
@@ skipping 239 matching lines @@
   [http_request_headers_ removeObjectForKey:key];
   if (![http_request_headers_ count])
     http_request_headers_.reset();
 }
 
 void NavigationItemImpl::ResetHttpRequestHeaders() {
   http_request_headers_.reset();
 }
 
 void NavigationItemImpl::ResetForCommit() {
-  // Any state that only matters when a navigation item is pending should be
-  // cleared here.
-  SetNavigationInitiationType(web::NavigationInitiationType::USER_INITIATED);
+  // Navigation initiation type is only valid for pending navigations, thus
+  // always reset to NONE after the item is committed.
+  SetNavigationInitiationType(web::NavigationInitiationType::NONE);
 }
 
 }  // namespace web