Revert of Move ui/gfx/codec/ into its own component. (patchset #7 id:120001 of https://codereview.chromium.org/2755563002/ )

Reason for revert:
Breaks a chromeos unittest.

Original issue's description:
> Move ui/gfx/codec/ into its own component.
>
> This is necessary to break an include cycle between cc and ui/gfx/ for upcoming
> changes to cc/paint/.
>
> TBR=robertphillips@google.com
>
> BUG=665259
>
> Review-Url: https://codereview.chromium.org/2755563002
> Cr-Commit-Position: refs/heads/master@{#457238}
> Committed: https://chromium.googlesource.com/chromium/src/+/e3d8f58563aececeeaa395795e022ddadf23c93d

TBR=rockot@chromium.org,sky@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=665259

Review-Url: https://codereview.chromium.org/2751103004
Cr-Commit-Position: refs/heads/master@{#457281}