WTF::notFound looks too much like a local variable.

Source/modules/device_orientation/DeviceSensorEventDispatcher.cpp

Index: Source/modules/device_orientation/DeviceSensorEventDispatcher.cpp
diff --git a/Source/modules/device_orientation/DeviceSensorEventDispatcher.cpp b/Source/modules/device_orientation/DeviceSensorEventDispatcher.cpp
index e48d4a3eed516f5ea0bb2a2bcbc034ec1513580b..b5cd6ffaf0e3d161b4249679df4d94179d4d84a7 100644
--- a/Source/modules/device_orientation/DeviceSensorEventDispatcher.cpp
+++ b/Source/modules/device_orientation/DeviceSensorEventDispatcher.cpp
@@ -61,7 +61,7 @@ void DeviceSensorEventDispatcher::removeController(DeviceSensorEventController*
     // This is to correctly handle the re-entrancy case when a controller is destroyed
     // while in the didChangeDeviceMotion/Orientation method.
     size_t index = m_controllers.find(controller);
-    if (index == notFound)
+    if (index == kNotFound)
         return;
 
     m_controllers[index] = 0;