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

content/browser/loader/resource_handler.h

 // 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.
 
 // This is the browser side of the resource dispatcher, it receives requests
 // from the RenderProcessHosts, and dispatches them to URLRequests. It then
 // fowards the messages from the URLRequests back to the correct process for
 // handling.
 //
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #ifndef CONTENT_BROWSER_LOADER_RESOURCE_HANDLER_H_
 #define CONTENT_BROWSER_LOADER_RESOURCE_HANDLER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "content/browser/loader/resource_controller.h"
 #include "content/common/content_export.h"
 
 class GURL;
 
 namespace net {
 class IOBuffer;
 class URLRequest;
 class URLRequestStatus;
 struct RedirectInfo;
 }  // namespace net
 
 namespace content {
 class ResourceMessageFilter;
 class ResourceRequestInfoImpl;
 struct ResourceResponse;
 
 // The resource dispatcher host uses this interface to process network events
 // for an URLRequest instance.  A ResourceHandler's lifetime is bound to its
 // associated URLRequest.
 //
 // No ResourceHandler method other than OnWillRead will ever be called
 // synchronously when it calls into the ResourceController passed in to it,
 // either to resume or cancel the request.
-class CONTENT_EXPORT ResourceHandler
-    : public NON_EXPORTED_BASE(base::NonThreadSafe) {
+class CONTENT_EXPORT ResourceHandler {
  public:
   virtual ~ResourceHandler();
 
   // Used to allow a ResourceHandler to cancel the request out of band, when it
   // may not have a ResourceController.
   class CONTENT_EXPORT Delegate {
    protected:
     Delegate();
     virtual ~Delegate();
 
@@ skipping 111 matching lines @@
   int GetRequestID() const;
   ResourceMessageFilter* GetFilter() const;
 
   Delegate* delegate() { return delegate_; }
 
  private:
   net::URLRequest* request_;
   Delegate* delegate_;
   std::unique_ptr<ResourceController> controller_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(ResourceHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_RESOURCE_HANDLER_H_