ThreadChecker instead of SequenceChecker in classes that use TLS.

content/child/fileapi/webfilesystem_impl.h

 // Copyright 2013 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_CHILD_FILEAPI_WEBFILESYSTEM_IMPL_H_
 #define CONTENT_CHILD_FILEAPI_WEBFILESYSTEM_IMPL_H_
 
 #include <map>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/sequence_checker.h"
+#include "base/threading/thread_checker.h"
 #include "content/public/child/worker_thread.h"
 #include "third_party/WebKit/public/platform/WebFileSystem.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
 namespace blink {
 class WebURL;
 class WebFileWriterClient;
@@ skipping 75 matching lines @@
 
   WaitableCallbackResults* MaybeCreateWaitableResults(
       const blink::WebFileSystemCallbacks& callbacks, int callbacks_id);
 
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
 
   CallbacksMap callbacks_;
   int next_callbacks_id_;
   WaitableCallbackResultsMap waitable_results_;
 
-  SEQUENCE_CHECKER(sequence_checker_);
+  // Thread-affine per use of TLS in impl.
+  THREAD_CHECKER(thread_checker_);
 
   DISALLOW_COPY_AND_ASSIGN(WebFileSystemImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_FILEAPI_WEBFILESYSTEM_IMPL_H_