Fix to streching image b/60173.
  It seems the problem was iOS specific. In retina displays the devicePixelRatio
turns out to be 2. This was making the images twice as wide. This was introduced
as a way to fix the resolution problem with some Apple devices, I suppose? Since this is not
fixing the problem I am removing it for the moment. Fixing the resolution issue implies
more changes that will be addressed in another iteration.

Bug: 60173
Change-Id: Iaff2aa6ba13ae85f905ab6d1569572881d8b5990