Fix remaining WeakPtrFactory ordering problems

chrome/browser/extensions/extension_resource_protocols.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 "chrome/browser/extensions/extension_resource_protocols.h"
 
 #include "base/files/file_path.h"
 #include "base/memory/weak_ptr.h"
 #include "base/path_service.h"
 #include "base/threading/sequenced_worker_pool.h"
@@ skipping 25 matching lines @@
   void Start() override;
 
   bool IsRedirectResponse(GURL* location, int* http_status_code) override;
 
  protected:
   ~ExtensionResourcesJob() override {}
 
   void ResolvePathDone(const base::FilePath& resolved_path);
 
  private:
+  base::ThreadChecker thread_checker_;
+
   base::WeakPtrFactory<ExtensionResourcesJob> weak_ptr_factory_;
 
-  base::ThreadChecker thread_checker_;
-
   DISALLOW_COPY_AND_ASSIGN(ExtensionResourcesJob);
 };
 
 void ExtensionResourcesJob::Start() {
   DCHECK(thread_checker_.CalledOnValidThread());
   content::BrowserThread::PostTaskAndReplyWithResult(
       content::BrowserThread::FILE, FROM_HERE,
       base::Bind(&ResolvePath, request()->url()),
       base::Bind(&ExtensionResourcesJob::ResolvePathDone,
           weak_ptr_factory_.GetWeakPtr()));
@@ skipping 31 matching lines @@
     net::URLRequest* request, net::NetworkDelegate* network_delegate) const {
   return new ExtensionResourcesJob(request, network_delegate);
 }
 
 }  // namespace
 
 net::URLRequestJobFactory::ProtocolHandler*
 CreateExtensionResourceProtocolHandler() {
   return new ExtensionResourceProtocolHandler();
 }