Move OneWriterSeqLock and SharedMemorySeqLockBuffer from content/ to device/base/synchronization

base/synchronization/shared_memory_seqlock_buffer.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_COMMON_SHARED_MEMORY_SEQLOCK_BUFFER_H_
-#define CONTENT_COMMON_SHARED_MEMORY_SEQLOCK_BUFFER_H_
+#ifndef BASE_SYNCHRONIZATION_SHARED_MEMORY_SEQLOCK_BUFFER_H_
+#define BASE_SYNCHRONIZATION_SHARED_MEMORY_SEQLOCK_BUFFER_H_
 
-#include "content/common/one_writer_seqlock.h"
+#include "base/synchronization/one_writer_seqlock.h"
 
-namespace content {
+namespace base {
 
 // This structure is stored in shared memory that's shared between the browser
 // which does the hardware polling, and the consumers of the data,
 // i.e. the renderers. The performance characteristics are that
 // we want low latency (so would like to avoid explicit communication via IPC
 // between producer and consumer) and relatively large data size.
 //
 // Writer and reader operate on the same buffer assuming contention is low, and
 // contention is detected by using the associated SeqLock.
 
-template<class Data>
+template <class Data>
 class SharedMemorySeqLockBuffer {

[timvolodine, 2016/09/23 17:34:27]

should this actually be in base/? i.e. is it required by the generic sensors?
(otherwise can leave in content/common)

  public:
   OneWriterSeqLock seqlock;
   Data data;
 };
 
-}  // namespace content
+}  // namespace base
 
-#endif  // CONTENT_COMMON_SHARED_MEMORY_SEQLOCK_BUFFER_H_
+#endif  // BASE_SYNCHRONIZATION_SHARED_MEMORY_SEQLOCK_BUFFER_H_