Implements part of Device Motion in the Renderer

content/browser/device_orientation/motion_message_filter.cc

Index: content/browser/device_orientation/motion_message_filter.cc
diff --git a/content/browser/device_orientation/motion_message_filter.cc b/content/browser/device_orientation/motion_message_filter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e24a1e548d6f4b14f0d2a1167946defd8a1f19fa
--- /dev/null
+++ b/content/browser/device_orientation/motion_message_filter.cc
@@ -0,0 +1,34 @@
+// Copyright (c) 2012 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_orientation/motion_message_filter.h"
+
+#include "content/browser/device_orientation/device_data.h"
+#include "content/common/device_motion_messages.h"
+#include "content/public/browser/browser_thread.h"
+
+using content::BrowserThread;
+
+namespace content {
+
+MotionMessageFilter::MotionMessageFilter()
+    : MessageFilter(DeviceData::kTypeMotion) {
+}
+
+MotionMessageFilter::~MotionMessageFilter() {
+}
+
+bool MotionMessageFilter::OnMessageReceived(const IPC::Message& message,
+                                            bool* message_was_ok) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(MotionMessageFilter, message, *message_was_ok)
+    IPC_MESSAGE_HANDLER(DeviceMotionHostMsg_StartUpdating, OnStartUpdating)
+    IPC_MESSAGE_HANDLER(DeviceMotionHostMsg_StopUpdating, OnStopUpdating)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+}  // namespace content