Replace deprecated base::NonThreadSafe in /content/browser/loader in favor of SequenceChecker.

content/browser/loader/resource_handler.cc

 // 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.
 
 #include "content/browser/loader/resource_handler.h"
 
 #include "content/browser/loader/resource_request_info_impl.h"
 
 namespace content {
 
 ResourceHandler::Delegate::Delegate() {}
 
 ResourceHandler::Delegate::~Delegate() {}
 
 void ResourceHandler::SetDelegate(Delegate* delegate) {
   delegate_ = delegate;
 }
 
-ResourceHandler::~ResourceHandler() {}
+ResourceHandler::~ResourceHandler() {
+  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
+}
 
 ResourceHandler::ResourceHandler(net::URLRequest* request)
     : request_(request) {}
 
 void ResourceHandler::HoldController(
     std::unique_ptr<ResourceController> controller) {
   controller_ = std::move(controller);
 }
 
 std::unique_ptr<ResourceController> ResourceHandler::ReleaseController() {
@@ skipping 28 matching lines @@
 
 int ResourceHandler::GetRequestID() const {
   return GetRequestInfo()->GetRequestID();
 }
 
 ResourceMessageFilter* ResourceHandler::GetFilter() const {
   return GetRequestInfo()->requester_info()->filter();
 }
 
 }  // namespace content