Replace deprecated base::NonThreadSafe in content/public/test in favor of SequenceChecker.

content/public/test/test_download_request_handler.h

 // Copyright 2015 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.
 
 #ifndef CONTENT_PUBLIC_TEST_TEST_DOWNLOAD_REQUEST_HANDLER_H_
 #define CONTENT_PUBLIC_TEST_TEST_DOWNLOAD_REQUEST_HANDLER_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <queue>
 
 #include "base/callback_forward.h"
 #include "base/files/file.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_errors.h"
 #include "net/http/http_byte_range.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_util.h"
 #include "net/url_request/url_request_job.h"
 #include "url/gurl.h"
 
 namespace content {
 
@@ skipping 27 matching lines @@
 //
 //  // Inject an error at offset 100.
 //  parameters.injected_errors.push(TestDownloadRequestHandler::InjectedError(
 //      100, net::ERR_CONNECTION_RESET));
 //
 //  // Start serving.
 //  request_handler.StartServing(parameters);
 //
 // At this point, you can initiate a URLRequest for request_handler.url(). The
 // request will fail when offset 100 is reached with the error specified above.
-class TestDownloadRequestHandler : public base::NonThreadSafe {
+class TestDownloadRequestHandler {
  public:
   // OnStartHandler can be used to intercept the Start() event of a new
   // URLRequest. Set it as the |on_start_handler| member of Parameters below.
   //
   // The callback is invoked on the thread on which TestDownloadRequestHandler
   // was created. Once the callback has a response ready, it can invoke the
   // OnStartResponseCallback object. The latter can be invoked on any thread and
   // will post back to the IO thread to continue with processing the Start()
   // event.
   //
@@ skipping 236 matching lines @@
   // Note: Don't use this function to generate a cryptographically secure
   // pseudo-random sequence.
   static void GetPatternBytes(int seed, int64_t offset, int length, char* data);
 
  private:
   class Interceptor;
   class PartialResponseJob;
 
   GURL url_;
   base::WeakPtr<Interceptor> interceptor_;
+
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(TestDownloadRequestHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_TEST_DOWNLOAD_REQUEST_HANDLER_H_