[Sensors] Align sensor reading updates and 'onchange' notification with rAF.

third_party/WebKit/Source/modules/sensor/Sensor.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 Sensor_h
 #define Sensor_h
 
 #include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/dom/SuspendableObject.h"
 #include "core/frame/PlatformEventController.h"
 #include "modules/EventTargetModules.h"
 #include "modules/sensor/SensorOptions.h"
 #include "modules/sensor/SensorProxy.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class ExceptionState;
 class ExecutionContext;
 class SensorReading;
-class SensorUpdateNotificationStrategy;
 
 class Sensor : public EventTargetWithInlineData,
                public ActiveScriptWrappable<Sensor>,
                public ContextLifecycleObserver,
                public SensorProxy::Observer {
   USING_GARBAGE_COLLECTED_MIXIN(Sensor);
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   enum class SensorState { Idle, Activating, Activated, Errored };
@@ skipping 42 matching lines @@
   virtual SensorConfigurationPtr createSensorConfig();
 
  private:
   void initSensorProxyIfNeeded();
 
   // ContextLifecycleObserver overrides.
   void contextDestroyed() override;
 
   // SensorController::Observer overrides.
   void onSensorInitialized() override;
-  void onSensorReadingChanged() override;
+  void onSensorReadingChanged(double timestamp) override;
   void onSensorError(ExceptionCode,
                      const String& sanitizedMessage,
                      const String& unsanitizedMessage) override;
-  void onSuspended() override;
 
   void onStartRequestCompleted(bool);
   void onStopRequestCompleted(bool);
 
   void startListening();
   void stopListening();
 
-  void onSensorUpdateNotification();
-
   void updateState(SensorState newState);
   void reportError(ExceptionCode = UnknownError,
                    const String& sanitizedMessage = String(),
                    const String& unsanitizedMessage = String());
 
   void notifySensorReadingChanged();
   void notifyOnActivate();
   void notifyError(DOMException* error);
 
  private:
   SensorOptions m_sensorOptions;
   device::mojom::blink::SensorType m_type;
   SensorState m_state;
   Member<SensorProxy> m_sensorProxy;
-  std::unique_ptr<SensorUpdateNotificationStrategy> m_sensorUpdateNotifier;
   device::SensorReading m_storedData;
   SensorConfigurationPtr m_configuration;
+  double m_lastUpdateTimestamp;
 };
 
 }  // namespace blink
 
 #endif  // Sensor_h