GitLab

No new code, just shuffling things around so WebKit/Source/modules
and content/renderer have a more related structure, also in terms
of bug components and OWNERS.

BUG=none  (no new code)

TBR=jochen@chromium.org
for adding a third_party/skia to DEPS; this dependency was
in content/renderer/media before anywa, and
third_party/skia hasn't got OWNERs itself :?

Review-Url: https://codereview.chromium.org/2739253003
Cr-Commit-Position: refs/heads/master@{#456149}