content: Initialize skia in the GPU process for OOP raster.

Pull out the common skia initialization setup to a skia_utils used for
skia initialization in both the renderer and GPU.

[email protected]

Bug: 844207
Change-Id: I629a7a036def92ede84dbb05f61207ce82762abf
Reviewed-on: https://chromium-review.googlesource.com/1081610
Commit-Queue: Khushal <[email protected]>
Reviewed-by: Antoine Labour <[email protected]>
Cr-Commit-Position: refs/heads/master@{#563506}
8 files changed