Add |notify_client_on_reading_change| flag to sensor configuration

device/generic_sensor/sensor_impl.h

Index: device/generic_sensor/sensor_impl.h
diff --git a/device/generic_sensor/sensor_impl.h b/device/generic_sensor/sensor_impl.h
index 4a6ecc95e0faaff7590e15aba65c74ad9b26a0ea..48ad53221a2143e60decbd6dd1572f171452a0c0 100644
--- a/device/generic_sensor/sensor_impl.h
+++ b/device/generic_sensor/sensor_impl.h
@@ -40,6 +40,10 @@ class SensorImpl final : public mojom::Sensor, public PlatformSensor::Client {
   scoped_refptr<PlatformSensor> sensor_;
   mojom::SensorClientPtr client_;
   bool suspended_;
+  // The number of configurations that have |suppress_on_change_events_|
+  // flag set to true. If there is at least one configuration that sets this
+  // flag to true, SensorClient::SensorReadingChanged() is not called.
+  int suppress_on_change_events_count_;
 
   DISALLOW_COPY_AND_ASSIGN(SensorImpl);
 };