[Sensors] Remove SensorReading interfaces

third_party/WebKit/Source/modules/sensor/AmbientLightSensorReading.cpp

-// 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 "modules/sensor/AmbientLightSensorReading.h"
-
-#include "modules/sensor/SensorProxy.h"
-#include "wtf/CurrentTime.h"
-
-namespace blink {
-
-namespace {
-
-device::SensorReading ToReadingData(const AmbientLightSensorReadingInit& init) {
-  device::SensorReading result;
-  result.timestamp = WTF::monotonicallyIncreasingTime();
-  if (init.hasIlluminance())
-    result.values[0] = init.illuminance();
-
-  return result;
-}
-
-}  // namespace
-
-AmbientLightSensorReading::AmbientLightSensorReading(
-    const AmbientLightSensorReadingInit& init)
-    : SensorReading(ToReadingData(init)) {}
-
-AmbientLightSensorReading::AmbientLightSensorReading(
-    const device::SensorReading& data)
-    : SensorReading(data) {}
-
-AmbientLightSensorReading::~AmbientLightSensorReading() = default;
-
-double AmbientLightSensorReading::illuminance() const {
-  return data().values[0];
-}
-
-bool AmbientLightSensorReading::isReadingUpdated(
-    const device::SensorReading& previous) const {
-  return previous.values[0] != illuminance();
-}
-
-DEFINE_TRACE(AmbientLightSensorReading) {
-  SensorReading::trace(visitor);
-}
-
-}  // namespace blink