[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;
+  bool operator>(const PlatformSensorConfiguration& other) const;

[dcheng, 2016/07/01 09:17:24]

Is this operator used? I don't see it stored in an ordered map anywhere.

[shalamov, 2016/07/01 14:22:47]

We will be using it to find optimal configuration, in following patches. You are
right, this can be removed for now.

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