Extract device_sensors to /device via Mojofication

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 "base/logging.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/shared_memory.h"
-#include "content/common/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);
-
-  static const int kMaximumContentionCount = 10;
-  base::SharedMemoryHandle renderer_shared_memory_handle_;
-  scoped_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);
-      temp_buffer_.reset(new Data);
-      return true;
-    }
-    return false;
-  }
-
- private:
-  SharedMemorySeqLockBuffer<Data>* buffer_;
-  scoped_ptr<Data> temp_buffer_;
-
-  DISALLOW_COPY_AND_ASSIGN(SharedMemorySeqLockReader);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_RENDERER_SHARED_MEMORY_SEQLOCK_READER_H_