[Sensors] OrientationSensor.quaternion returns [x, y, z, w]

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

Index: third_party/WebKit/Source/modules/sensor/OrientationSensor.cpp
diff --git a/third_party/WebKit/Source/modules/sensor/OrientationSensor.cpp b/third_party/WebKit/Source/modules/sensor/OrientationSensor.cpp
index 3d1cc1518c5a3d22aabd756d3eeabc6d211a03b8..a4d70a41e48a7abfe62c135cea48009c14c74493 100644
--- a/third_party/WebKit/Source/modules/sensor/OrientationSensor.cpp
+++ b/third_party/WebKit/Source/modules/sensor/OrientationSensor.cpp
@@ -15,10 +15,10 @@ Vector<double> OrientationSensor::quaternion(bool& is_null) {
   reading_dirty_ = false;
   is_null = !CanReturnReadings();
   return is_null ? Vector<double>()
-                 : Vector<double>({ReadingValueUnchecked(3),    // W
-                                   ReadingValueUnchecked(0),    // Vx
+                 : Vector<double>({ReadingValueUnchecked(0),    // Vx
                                    ReadingValueUnchecked(1),    // Vy
-                                   ReadingValueUnchecked(2)});  // Vz
+                                   ReadingValueUnchecked(2),    // Vz
+                                   ReadingValueUnchecked(3)});  // W
 }
 
 template <typename T>