1 files changed, 62 insertions, 0 deletions
diff --git a/chromium/content/browser/device_sensors/device_motion_message_filter.cc b/chromium/content/browser/device_sensors/device_motion_message_filter.cc
new file mode 100644
index 00000000000..2994c383f15
--- /dev/null
+++ b/chromium/content/browser/device_sensors/device_motion_message_filter.cc
@@ -0,0 +1,62 @@
+// 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 "content/browser/device_sensors/device_motion_message_filter.h"
+
+#include "content/browser/device_sensors/device_inertial_sensor_service.h"
+#include "content/common/device_sensors/device_motion_messages.h"
+
+namespace content {
+
+DeviceMotionMessageFilter::DeviceMotionMessageFilter()
+    : BrowserMessageFilter(DeviceMotionMsgStart),
+      is_started_(false) {
+}
+
+DeviceMotionMessageFilter::~DeviceMotionMessageFilter() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  if (is_started_)
+    DeviceInertialSensorService::GetInstance()->RemoveConsumer(
+        CONSUMER_TYPE_MOTION);
+}
+
+bool DeviceMotionMessageFilter::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(DeviceMotionMessageFilter, message)
+    IPC_MESSAGE_HANDLER(DeviceMotionHostMsg_StartPolling,
+                        OnDeviceMotionStartPolling)
+    IPC_MESSAGE_HANDLER(DeviceMotionHostMsg_StopPolling,
+                        OnDeviceMotionStopPolling)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void DeviceMotionMessageFilter::OnDeviceMotionStartPolling() {
+  DCHECK(!is_started_);
+  if (is_started_)
+    return;
+  is_started_ = true;
+  DeviceInertialSensorService::GetInstance()->AddConsumer(
+      CONSUMER_TYPE_MOTION);
+  DidStartDeviceMotionPolling();
+}
+
+void DeviceMotionMessageFilter::OnDeviceMotionStopPolling() {
+  DCHECK(is_started_);
+  if (!is_started_)
+    return;
+  is_started_ = false;
+  DeviceInertialSensorService::GetInstance()->RemoveConsumer(
+      CONSUMER_TYPE_MOTION);
+}
+
+void DeviceMotionMessageFilter::DidStartDeviceMotionPolling() {
+  Send(new DeviceMotionMsg_DidStartPolling(
+      DeviceInertialSensorService::GetInstance()->
+          GetSharedMemoryHandleForProcess(
+              CONSUMER_TYPE_MOTION, PeerHandle())));
+}
+
+}  // namespace content