Remove device light API

third_party/WebKit/Source/modules/device_light/DeviceLightDispatcher.cpp

-// Copyright 2014 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/device_light/DeviceLightDispatcher.h"
-
-#include "modules/device_light/DeviceLightController.h"
-#include "public/platform/Platform.h"
-
-namespace blink {
-
-DeviceLightDispatcher& DeviceLightDispatcher::instance() {
-  DEFINE_STATIC_LOCAL(DeviceLightDispatcher, deviceLightDispatcher,
-                      (new DeviceLightDispatcher));
-  return deviceLightDispatcher;
-}
-
-DeviceLightDispatcher::DeviceLightDispatcher() : m_lastDeviceLightData(-1) {}
-
-DeviceLightDispatcher::~DeviceLightDispatcher() {}
-
-DEFINE_TRACE(DeviceLightDispatcher) {
-  PlatformEventDispatcher::trace(visitor);
-}
-
-void DeviceLightDispatcher::startListening() {
-  Platform::current()->startListening(WebPlatformEventTypeDeviceLight, this);
-}
-
-void DeviceLightDispatcher::stopListening() {
-  Platform::current()->stopListening(WebPlatformEventTypeDeviceLight);
-  m_lastDeviceLightData = -1;
-}
-
-void DeviceLightDispatcher::didChangeDeviceLight(double value) {
-  m_lastDeviceLightData = value;
-  notifyControllers();
-}
-
-double DeviceLightDispatcher::latestDeviceLightData() const {
-  return m_lastDeviceLightData;
-}
-
-}  // namespace blink