Remove DeviceLightEvent implementation

third_party/WebKit/Source/modules/device_light/DeviceLightController.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/DeviceLightController.h"
-
-#include "core/dom/Document.h"
-#include "modules/EventModules.h"
-#include "modules/device_light/DeviceLightDispatcher.h"
-#include "modules/device_light/DeviceLightEvent.h"
-#include "platform/RuntimeEnabledFeatures.h"
-
-namespace blink {
-
-DeviceLightController::DeviceLightController(Document& document)
-    : DeviceSingleWindowEventController(document),
-      Supplement<Document>(document) {}
-
-DeviceLightController::~DeviceLightController() {}
-
-const char* DeviceLightController::SupplementName() {
-  return "DeviceLightController";
-}
-
-DeviceLightController& DeviceLightController::From(Document& document) {
-  DeviceLightController* controller = static_cast<DeviceLightController*>(
-      Supplement<Document>::From(document, SupplementName()));
-  if (!controller) {
-    controller = new DeviceLightController(document);
-    Supplement<Document>::ProvideTo(document, SupplementName(), controller);
-  }
-  return *controller;
-}
-
-bool DeviceLightController::HasLastData() {
-  return DeviceLightDispatcher::Instance().LatestDeviceLightData() >= 0;
-}
-
-void DeviceLightController::RegisterWithDispatcher() {
-  DeviceLightDispatcher::Instance().AddController(this);
-}
-
-void DeviceLightController::UnregisterWithDispatcher() {
-  DeviceLightDispatcher::Instance().RemoveController(this);
-}
-
-Event* DeviceLightController::LastEvent() const {
-  return DeviceLightEvent::Create(
-      EventTypeNames::devicelight,
-      DeviceLightDispatcher::Instance().LatestDeviceLightData());
-}
-
-bool DeviceLightController::IsNullEvent(Event* event) const {
-  DeviceLightEvent* light_event = ToDeviceLightEvent(event);
-  return light_event->value() == std::numeric_limits<double>::infinity();
-}
-
-const AtomicString& DeviceLightController::EventTypeName() const {
-  return EventTypeNames::devicelight;
-}
-
-DEFINE_TRACE(DeviceLightController) {
-  DeviceSingleWindowEventController::Trace(visitor);
-  Supplement<Document>::Trace(visitor);
-}
-
-}  // namespace blink