[sensors] Introduce Generic Sensor API interfaces

device/generic_sensor/platform_sensor_configuration.cc

Index: device/generic_sensor/platform_sensor_configuration.cc
diff --git a/device/generic_sensor/platform_sensor_configuration.cc b/device/generic_sensor/platform_sensor_configuration.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b67740c606f1c4fcc7e92dbc4d6058c594c1bd20
--- /dev/null
+++ b/device/generic_sensor/platform_sensor_configuration.cc
@@ -0,0 +1,22 @@
+// 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.
+
+#include "device/generic_sensor/platform_sensor_configuration.h"
+
+namespace device {
+
+PlatformSensorConfiguration::PlatformSensorConfiguration(double frequency)
+    : frequency_(frequency) {
+  DCHECK(frequency_ <= 60.0 && frequency_ > 0.0);
+}
+
+PlatformSensorConfiguration::PlatformSensorConfiguration() = default;
+PlatformSensorConfiguration::~PlatformSensorConfiguration() = default;
+
+bool PlatformSensorConfiguration::operator==(
+    const PlatformSensorConfiguration& other) const {
+  return frequency_ == other.frequency();
+}
+
+}  // namespace device