Convert device_sensors to use mojo.

content/browser/device_sensors/device_sensor_host.cc

Index: content/browser/device_sensors/device_sensor_host.cc
diff --git a/content/browser/device_sensors/device_sensor_host.cc b/content/browser/device_sensors/device_sensor_host.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9f5fd66c6822259b745b166ed20ac4937568c4ab
--- /dev/null
+++ b/content/browser/device_sensors/device_sensor_host.cc
@@ -0,0 +1,64 @@
+// 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 "content/browser/device_sensors/device_sensor_host.h"
+
+#include "content/browser/device_sensors/device_inertial_sensor_service.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace content {
+
+template <typename MojoInterface, ConsumerType consumer_type>
+void DeviceSensorHost<MojoInterface, consumer_type>::Create(
+    mojo::InterfaceRequest<MojoInterface> request) {
+  new DeviceSensorHost(std::move(request));
+}
+
+template <typename MojoInterface, ConsumerType consumer_type>
+DeviceSensorHost<MojoInterface, consumer_type>::DeviceSensorHost(
+    mojo::InterfaceRequest<MojoInterface> request)
+    : is_started_(false), binding_(this, std::move(request)) {}
+
+template <typename MojoInterface, ConsumerType consumer_type>
+DeviceSensorHost<MojoInterface, consumer_type>::~DeviceSensorHost() {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  if (is_started_)
+    DeviceInertialSensorService::GetInstance()->RemoveConsumer(consumer_type);
+}
+
+template <typename MojoInterface, ConsumerType consumer_type>
+void DeviceSensorHost<MojoInterface, consumer_type>::DeviceSensorHost::
+    StartPolling(const typename MojoInterface::StartPollingCallback& callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  DCHECK(!is_started_);
+  if (is_started_)
+    return;
+  is_started_ = true;
+  DeviceInertialSensorService::GetInstance()->AddConsumer(consumer_type);
+  callback.Run(
+      DeviceInertialSensorService::GetInstance()->GetSharedMemoryHandle(
+          consumer_type));
+}
+
+template <typename MojoInterface, ConsumerType consumer_type>
+void DeviceSensorHost<MojoInterface,
+                      consumer_type>::DeviceSensorHost::StopPolling() {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  DCHECK(is_started_);
+  if (!is_started_)
+    return;
+  is_started_ = false;
+  DeviceInertialSensorService::GetInstance()->RemoveConsumer(consumer_type);
+}
+
+template class DeviceSensorHost<device::mojom::LightSensor,
+                                CONSUMER_TYPE_LIGHT>;
+template class DeviceSensorHost<device::mojom::MotionSensor,
+                                CONSUMER_TYPE_MOTION>;
+template class DeviceSensorHost<device::mojom::OrientationSensor,
+                                CONSUMER_TYPE_ORIENTATION>;
+template class DeviceSensorHost<device::mojom::OrientationAbsoluteSensor,
+                                CONSUMER_TYPE_ORIENTATION_ABSOLUTE>;
+
+}  // namespace content