Move //device/sensor impl to be part of the internal implemenation of the Device Service.

device/sensors/public/cpp/motion_data.cc

-// 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.
-
-#include "device/sensors/public/cpp/motion_data.h"
-
-#include <string.h>
-
-namespace device {
-
-MotionData::MotionData() {
-  // Make sure to zero out the memory so that there are no uninitialized bits.
-  // This object is used in the shared memory buffer and is memory copied by
-  // two processes. Valgrind will complain if we copy around memory that is
-  // only partially initialized.
-  memset(this, 0, sizeof(*this));
-}
-
-MotionData::MotionData(const MotionData& other) = default;
-
-}  // namespace device