openlayers/ol3 — pull request #816 by ahocevar (2013-06-24 21:17:28+00:00)
Title: Use ol.Projection#.getMetersPerUnit()

As a follow-up to #815, this change makes
ol.tilegrid.createForProjection work in cases where a Proj4
projection does not have units set. For better code readability,
a new variable is used when calculating the resolution.