Expose Android sensors to via Mojo services

sky/services/sensors/sensors.mojom

Index: sky/services/sensors/sensors.mojom
diff --git a/sky/services/sensors/sensors.mojom b/sky/services/sensors/sensors.mojom
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+// Copyright 2015 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.
+
+module sensors;
+
+enum SensorType {
+  ACCELEROMETER,
+  AMBIENT_TEMPERATURE,
+  GAME_ROTATION_VECTOR,
+  GEOMAGNETIC_ROTATION_VECTOR,
+  GRAVITY,
+  GYROSCOPE,
+  GYROSCOPE_UNCALIBRATED,
+  HEART_RATE,
+  LIGHT,
+  LINEAR_ACCELERATION,
+  MAGNETIC_FIELD,
+  MAGNETIC_FIELD_UNCALIBRATED,
+  PRESSURE,
+  PROXIMITY,
+  RELATIVE_HUMIDITY,
+  ROTATION_VECTOR,
+  SIGNIFICANT_MOTION,
+  STEP_COUNTER,
+  STEP_DETECTOR,
+};
+
+struct SensorData {
+  int32 accuracy;
+  int64 time_stamp;
+  array<float> values;
+};
+
+interface SensorListener {
+  OnAccuracyChanged(int32 accuracy);
+  OnSensorChanged(SensorData data);
+};
+
+interface SensorService {
+  AddListener(SensorType type, SensorListener listener);
+};