Move the Sudden Motion Sensor library into third_party.

third_party/sudden_motion_sensor/sudden_motion_sensor.gyp

Index: third_party/sudden_motion_sensor/sudden_motion_sensor.gyp
diff --git a/third_party/sudden_motion_sensor/sudden_motion_sensor.gyp b/third_party/sudden_motion_sensor/sudden_motion_sensor.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..897421b82532c6f1eae7a47aa49f2643546b5394
--- /dev/null
+++ b/third_party/sudden_motion_sensor/sudden_motion_sensor.gyp
@@ -0,0 +1,19 @@
+# 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.
+
+{
+  'targets': [
+    {
+      'target_name': 'sudden_motion_sensor',
+      'type': 'static_library',
+      'dependencies': [
+        '<(DEPTH)/base/base.gyp:base',
+      ],
+      'sources': [
+        'sudden_motion_sensor_mac.cc',
+        'sudden_motion_sensor_mac.h',
+      ],
+    },
+  ],
+}