Refactor content/renderer/device_sensors to use device/generic_sensor instead of device/sensors

device/sensors/device_sensor_service.cc

-// 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 "device/sensors/device_sensor_service.h"
-
-#include "base/bind.h"
-#include "base/logging.h"
-#include "base/memory/singleton.h"
-#include "base/trace_event/trace_event.h"
-#include "device/sensors/data_fetcher_shared_memory.h"
-
-namespace device {
-
-DeviceSensorService::DeviceSensorService()
-    : num_motion_readers_(0),
-      num_orientation_readers_(0),
-      num_orientation_absolute_readers_(0),
-      is_shutdown_(false) {
-  base::MessageLoop::current()->AddDestructionObserver(this);
-}
-
-DeviceSensorService::~DeviceSensorService() {}
-
-DeviceSensorService* DeviceSensorService::GetInstance() {
-  return base::Singleton<DeviceSensorService, base::LeakySingletonTraits<
-                                                  DeviceSensorService>>::get();
-}
-
-void DeviceSensorService::AddConsumer(ConsumerType consumer_type) {
-  if (!ChangeNumberConsumers(consumer_type, 1))
-    return;
-
-  DCHECK(GetNumberConsumers(consumer_type));
-
-  if (!data_fetcher_)
-    data_fetcher_.reset(new DataFetcherSharedMemory);
-  data_fetcher_->StartFetchingDeviceData(consumer_type);
-}
-
-void DeviceSensorService::RemoveConsumer(ConsumerType consumer_type) {
-  if (!ChangeNumberConsumers(consumer_type, -1))
-    return;
-
-  if (GetNumberConsumers(consumer_type) == 0)
-    data_fetcher_->StopFetchingDeviceData(consumer_type);
-}
-
-bool DeviceSensorService::ChangeNumberConsumers(ConsumerType consumer_type,
-                                                int delta) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (is_shutdown_)
-    return false;
-
-  switch (consumer_type) {
-    case CONSUMER_TYPE_MOTION:
-      num_motion_readers_ += delta;
-      DCHECK_GE(num_motion_readers_, 0);
-      return true;
-    case CONSUMER_TYPE_ORIENTATION:
-      num_orientation_readers_ += delta;
-      DCHECK_GE(num_orientation_readers_, 0);
-      return true;
-    case CONSUMER_TYPE_ORIENTATION_ABSOLUTE:
-      num_orientation_absolute_readers_ += delta;
-      DCHECK_GE(num_orientation_absolute_readers_, 0);
-      return true;
-    default:
-      NOTREACHED();
-  }
-  return false;
-}
-
-int DeviceSensorService::GetNumberConsumers(ConsumerType consumer_type) const {
-  switch (consumer_type) {
-    case CONSUMER_TYPE_MOTION:
-      return num_motion_readers_;
-    case CONSUMER_TYPE_ORIENTATION:
-      return num_orientation_readers_;
-    case CONSUMER_TYPE_ORIENTATION_ABSOLUTE:
-      return num_orientation_absolute_readers_;
-    default:
-      NOTREACHED();
-  }
-  return 0;
-}
-
-mojo::ScopedSharedBufferHandle DeviceSensorService::GetSharedMemoryHandle(
-    ConsumerType consumer_type) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  return data_fetcher_->GetSharedMemoryHandle(consumer_type);
-}
-
-void DeviceSensorService::WillDestroyCurrentMessageLoop() {
-  base::MessageLoop::current()->RemoveDestructionObserver(this);
-  TRACE_EVENT0("shutdown", "DeviceSensorService::Subsystem:SensorService");
-  Shutdown();
-}
-
-void DeviceSensorService::Shutdown() {
-  if (data_fetcher_) {
-    data_fetcher_->Shutdown();
-    data_fetcher_.reset();
-  }
-  is_shutdown_ = true;
-}
-
-void DeviceSensorService::SetDataFetcherForTesting(
-    DataFetcherSharedMemory* test_data_fetcher) {
-  if (data_fetcher_)
-    data_fetcher_->Shutdown();
-  data_fetcher_.reset(test_data_fetcher);
-}
-
-}  // namespace device