[Sensors] Implement bindings for AbsoluteOrientationSensor

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

 // 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.
 
 #include "modules/sensor/Sensor.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/TaskRunnerHelper.h"
 #include "core/inspector/ConsoleMessage.h"
@@ skipping 145 matching lines @@
   if (frequency > maximumFrequency)
     frequency = maximumFrequency;
   if (frequency < minimumFrequency)
     frequency = minimumFrequency;
 
   result->frequency = frequency;
   return result;
 }
 
 double Sensor::readingValue(int index, bool& isNull) const {
-  if (!canReturnReadings()) {
-    isNull = true;
-    return 0.0;
-  }
+  isNull = !canReturnReadings();
+  return isNull ? 0.0 : readingValueUnchecked(index);
+}
+
+double Sensor::readingValueUnchecked(int index) const {
   DCHECK(m_sensorProxy);
   DCHECK(index >= 0 && index < device::SensorReading::kValuesCount);
   return m_sensorProxy->reading().values[index];
 }
 
 void Sensor::initSensorProxyIfNeeded() {
   if (m_sensorProxy)
     return;
 
   Document* document = toDocument(getExecutionContext());
@@ skipping 131 matching lines @@
 void Sensor::notifyOnActivate() {
   dispatchEvent(Event::create(EventTypeNames::activate));
 }
 
 void Sensor::notifyError(DOMException* error) {
   dispatchEvent(
       SensorErrorEvent::create(EventTypeNames::error, std::move(error)));
 }
 
 bool Sensor::canReturnReadings() const {
-  if (m_state != Sensor::SensorState::Activated)
+  if (!isActivated())
     return false;
   DCHECK(m_sensorProxy);
   return m_sensorProxy->reading().timestamp != 0.0;
 }
 
 }  // namespace blink