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

content/renderer/shared_memory_seqlock_reader.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_RENDERER_SHARED_MEMORY_SEQLOCK_READER_H_
 #define CONTENT_RENDERER_SHARED_MEMORY_SEQLOCK_READER_H_
 
 #include <stddef.h>
 
 #include <memory>
 
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/shared_memory.h"
-#include "content/common/shared_memory_seqlock_buffer.h"
+#include "base/synchronization/shared_memory_seqlock_buffer.h"
 
 namespace content {
 namespace internal {
 
 class SharedMemorySeqLockReaderBase  {
  protected:
   SharedMemorySeqLockReaderBase();
   virtual ~SharedMemorySeqLockReaderBase();
 
   void* InitializeSharedMemory(
       base::SharedMemoryHandle shared_memory_handle,
       size_t buffer_size);
 
-  bool FetchFromBuffer(content::OneWriterSeqLock* seqlock, void* final,
-      void* temp, void* from, size_t size);
+  bool FetchFromBuffer(base::OneWriterSeqLock* seqlock,
+                       void* final,
+                       void* temp,
+                       void* from,
+                       size_t size);
 
   static const int kMaximumContentionCount = 10;
   base::SharedMemoryHandle renderer_shared_memory_handle_;
   std::unique_ptr<base::SharedMemory> renderer_shared_memory_;
 };
 
 }  // namespace internal
 
 // Template argument Data should be a pod-like structure only containing
 // data fields, such that it is copyable by memcpy method.
 template<typename Data>
 class SharedMemorySeqLockReader
     : private internal::SharedMemorySeqLockReaderBase {
  public:
   SharedMemorySeqLockReader() : buffer_(0) { }
   virtual ~SharedMemorySeqLockReader() { }
 
   bool GetLatestData(Data* data) {
     DCHECK(buffer_);
     DCHECK(sizeof(*data) == sizeof(*temp_buffer_));
     return FetchFromBuffer(&buffer_->seqlock, data, temp_buffer_.get(),
         &buffer_->data, sizeof(*temp_buffer_));
   }
 
   bool Initialize(base::SharedMemoryHandle shared_memory_handle) {
     if (void* memory = InitializeSharedMemory(
-        shared_memory_handle, sizeof(SharedMemorySeqLockBuffer<Data>))) {
-      buffer_ = static_cast<SharedMemorySeqLockBuffer<Data>*>(memory);
+            shared_memory_handle,

[timvolodine, 2016/09/23 17:34:28]

is this the correct indentation? I thought it should be +4sp

+            sizeof(base::SharedMemorySeqLockBuffer<Data>))) {
+      buffer_ = static_cast<base::SharedMemorySeqLockBuffer<Data>*>(memory);
       temp_buffer_.reset(new Data);
       return true;
     }
     return false;
   }
 
  private:
-  SharedMemorySeqLockBuffer<Data>* buffer_;
+  base::SharedMemorySeqLockBuffer<Data>* buffer_;
   std::unique_ptr<Data> temp_buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(SharedMemorySeqLockReader);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_SHARED_MEMORY_SEQLOCK_READER_H_