Revert "Revert "Air Mouse""

This reverts commit bbc0888b45.

applications/plugins/airmouse/tracking/sensors/gyroscope_data.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2019 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef CARDBOARD_SDK_SENSORS_GYROSCOPE_DATA_H_
+#define CARDBOARD_SDK_SENSORS_GYROSCOPE_DATA_H_
+
+#include "../util/vector.h"
+
+namespace cardboard {
+
+struct GyroscopeData {
+    // System wall time.
+    uint64_t system_timestamp;
+
+    // Sensor clock time in nanoseconds.
+    uint64_t sensor_timestamp_ns;
+
+    // Rate of rotation around the x,y,z axes in rad/s. This follows android
+    // specification
+    // (https://developer.android.com/guide/topics/sensors/sensors_overview.html#sensors-coords).
+    Vector3 data;
+};
+
+} // namespace cardboard
+
+#endif // CARDBOARD_SDK_SENSORS_GYROSCOPE_DATA_H_