Add |notify_client_on_reading_change| flag to sensor configuration

device/generic_sensor/public/cpp/platform_sensor_configuration.h

Index: device/generic_sensor/public/cpp/platform_sensor_configuration.h
diff --git a/device/generic_sensor/public/cpp/platform_sensor_configuration.h b/device/generic_sensor/public/cpp/platform_sensor_configuration.h
index e124eaa1e62a1900faf4d11e301d0c5524575ef4..9d36b552043e34bad17c5d599507a4bbc558d229 100644
--- a/device/generic_sensor/public/cpp/platform_sensor_configuration.h
+++ b/device/generic_sensor/public/cpp/platform_sensor_configuration.h
@@ -26,8 +26,17 @@ class DEVICE_GENERIC_SENSOR_PUBLIC_EXPORT PlatformSensorConfiguration {
   void set_frequency(double frequency);
   double frequency() const { return frequency_; }
 
+  void set_notify_client_on_reading_change(
+      bool notify_client_on_reading_change) {
+    notify_client_on_reading_change_ = notify_client_on_reading_change;
+  }
+  bool notify_client_on_reading_change() const {
+    return notify_client_on_reading_change_;
+  }
+
  private:
   double frequency_ = 1.0;  // 1 Hz by default.
+  bool notify_client_on_reading_change_ = true;

[Reilly Grant (use Gerrit), 2017/06/09 18:03:39]

Because only ON_CHANGE sensors generate notifications and the goal of this patch
is to suppress them when the client is going to be polling shared memory instead
I would name this "suppress_on_change_events" and default to false.

[juncai, 2017/06/09 19:00:51]

Done.

 };
 
 }  // namespace device