[Sensors] Decouple sensor readings update from rAF

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

Index: third_party/WebKit/Source/modules/sensor/Sensor.h
diff --git a/third_party/WebKit/Source/modules/sensor/Sensor.h b/third_party/WebKit/Source/modules/sensor/Sensor.h
index a6370711f54ff7406a8ea5b40f62c9e8eb5db17b..00e41793cc23ee8c7356d8a23c3dd3ddbc6d320f 100644
--- a/third_party/WebKit/Source/modules/sensor/Sensor.h
+++ b/third_party/WebKit/Source/modules/sensor/Sensor.h
@@ -79,19 +79,19 @@ class Sensor : public EventTargetWithInlineData,
   bool CanReturnReadings() const;
   bool IsActivated() const { return state_ == SensorState::kActivated; }
 
- private:
-  void InitSensorProxyIfNeeded();
-
-  // ContextLifecycleObserver overrides.
-  void ContextDestroyed(ExecutionContext*) override;
-
   // SensorProxy::Observer overrides.
   void OnSensorInitialized() override;
-  void NotifySensorChanged(double timestamp) override;
+  void OnSensorReadingChanged(double timestamp) override;
   void OnSensorError(ExceptionCode,
                      const String& sanitized_message,
                      const String& unsanitized_message) override;
 
+ private:
+  void InitSensorProxyIfNeeded();
+
+  // ContextLifecycleObserver overrides.
+  void ContextDestroyed(ExecutionContext*) override;
+
   void OnAddConfigurationRequestCompleted(bool);
 
   void StartListening();
@@ -104,7 +104,7 @@ class Sensor : public EventTargetWithInlineData,
                    const String& sanitized_message = String(),
                    const String& unsanitized_message = String());
 
-  void NotifySensorReadingChanged();
+  void UpdateReading();
   void NotifyOnActivate();
   void NotifyError(DOMException* error);
 
@@ -113,9 +113,10 @@ class Sensor : public EventTargetWithInlineData,
   device::mojom::blink::SensorType type_;
   SensorState state_;
   Member<SensorProxy> sensor_proxy_;
-  device::SensorReading stored_data_;
+  device::SensorReading reading_;
   SensorConfigurationPtr configuration_;
   double last_update_timestamp_;
+  bool pending_reading_update_;
 };
 
 }  // namespace blink