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

services/device/public/cpp/sensors/device_util_mac.cc

 // Copyright 2016 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/device_util_mac.h"
+#include "services/device/sensors/public/cpp/device_util_mac.h"
 
 #include <math.h>
 
 namespace device {
 
 double LMUvalueToLux(uint64_t raw_value) {
   // Conversion formula from regression.
   // https://bugzilla.mozilla.org/show_bug.cgi?id=793728
   // Let x = raw_value, then
   // lux = -2.978303814*(10^-27)*x^4 + 2.635687683*(10^-19)*x^3 -
   //       3.459747434*(10^-12)*x^2 + 3.905829689*(10^-5)*x - 0.1932594532
 
   static const long double k4 = pow(10.L, -7);
   static const long double k3 = pow(10.L, -4);
   static const long double k2 = pow(10.L, -2);
   static const long double k1 = pow(10.L, 5);
   long double scaled_value = raw_value / k1;
 
   long double lux_value =
       (-3 * k4 * pow(scaled_value, 4)) + (2.6 * k3 * pow(scaled_value, 3)) +
       (-3.4 * k2 * pow(scaled_value, 2)) + (3.9 * scaled_value) - 0.19;
 
   double lux = ceil(static_cast<double>(lux_value));
   return lux > 0 ? lux : 0;
 }
 
 }  // namespace device