Commits on Jun 9, 2019

1. Implement WheelEvent Interface …

   Note: The WheelEvent interface supports rotation in all 3 spatial
   dimensions. This implementation only supports two due to limitations
   in the Glutin compositor.
   
   The wheelevent interface is a dom interface that triggers for any
   attached device that can rotate in one or more spatial dimensions.
   Traditionally this is the mouse wheel though other devices could be
   used as well. E.g. the trackball on a trackball mouse.

   

   robert-snakard authored and jdm committed Jun 9, 2019
   35bca99

2. Add WPT tests for WheelEvent …

   The wheelevent sends a signal when a supported device is rotated in the
   x, y, or z rotational dimensions. These tests only check whether this
   signal is received for any rotation at all.

   

   robert-snakard authored and jdm committed Jun 9, 2019

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