[Sensors] Remove SensorReading interfaces

third_party/WebKit/Source/modules/sensor/AmbientLightSensor.h

Index: third_party/WebKit/Source/modules/sensor/AmbientLightSensor.h
diff --git a/third_party/WebKit/Source/modules/sensor/AmbientLightSensor.h b/third_party/WebKit/Source/modules/sensor/AmbientLightSensor.h
index 345117c1fcbbacc181af197d5f33af3849c403ad..c5346e7797fb0dbac11a5b00b88e9ed56b7f258d 100644
--- a/third_party/WebKit/Source/modules/sensor/AmbientLightSensor.h
+++ b/third_party/WebKit/Source/modules/sensor/AmbientLightSensor.h
@@ -9,8 +9,6 @@
 
 namespace blink {
 
-class AmbientLightSensorReading;
-
 class AmbientLightSensor final : public Sensor {
   DEFINE_WRAPPERTYPEINFO();
 
@@ -20,14 +18,12 @@ class AmbientLightSensor final : public Sensor {
                                     ExceptionState&);
   static AmbientLightSensor* create(ExecutionContext*, ExceptionState&);
 
-  AmbientLightSensorReading* reading() const;
+  double illuminance(bool& isNull) const;
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   AmbientLightSensor(ExecutionContext*, const SensorOptions&, ExceptionState&);
-  // Sensor overrides.
-  std::unique_ptr<SensorReadingFactory> createSensorReadingFactory() override;
 };
 
 }  // namespace blink