[sensors] Introduce Generic Sensor API interfaces

device/sensors/platform_sensor_configuration.h

+// Copyright 2016 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.
+
+#ifndef DEVICE_SENSORS_PLATFORM_SENSOR_CONFIGURATION_H_
+#define DEVICE_SENSORS_PLATFORM_SENSOR_CONFIGURATION_H_
+
+namespace device {
+
+class PlatformSensorConfiguration {
+ public:
+  PlatformSensorConfiguration();
+  explicit PlatformSensorConfiguration(double frequency);
+  ~PlatformSensorConfiguration();
+
+  bool operator==(const PlatformSensorConfiguration& other) const;
+
+  void SetFrequency(double frequency);

[dcheng, 2016/07/06 02:07:29]

Note that usually simple getters / setters like this are inlined in the header.
I'm not sure if it's too late / too much work to change this though (and it can
be done in a followup)

[shalamov, 2016/07/06 07:15:10]

Done.

+  double GetFrequency() const;
+
+ private:
+  double frequency_;
+};
+
+}  // namespace device
+
+#endif  // DEVICE_SENSORS_PLATFORM_SENSOR_CONFIGURATION_H_