Revert of Move AppliedTextDecorationList to its own file. (patchset #2 id:20001 of https://codereview.chromium.org/2884553002/ )

Reason for revert:
Reverting since the BUILD file wasn't updated. Author is aware

Original issue's description:
> Move AppliedTextDecorationList to its own file.
>
> When we generate external types like Length in ComputedStyle, we specify
> the path to the type (e.g. "platform/Length"). We then deduce the name
> of the type from the path ("Length"). This means that the type must be
> stored in a file with the same name.
>
> This patch moves AppliedTextDecorationList to its own file so that it
> can be generated.
>
> BUG=628043
>
> Review-Url: https://codereview.chromium.org/2884553002
> Cr-Commit-Position: refs/heads/master@{#471653}
> Committed: https://chromium.googlesource.com/chromium/src/+/762e2d87addf15f32ac5bda17b1ad9a8fb25dee2

TBR=suzyh@chromium.org,shend@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=628043

Review-Url: https://codereview.chromium.org/2880963003
Cr-Commit-Position: refs/heads/master@{#471656}
2 files changed