Revert of Move nested classes in ComputedStyleBase outside.

Revert of Move nested classes in ComputedStyleBase outside. (patchset #1 id:1 of https://codereview.chromium.org/2869613002/ )

Reason for revert:
Did not decrease binary size.

Original issue's description:
> Move nested classes in ComputedStyleBase outside.
> 
> Currently, groups such as StyleSurroundData are stored as nested classes
> in ComputedStyleBase. It is suspected that this is causing an increase
> in binary size. In an atttempt to restore the binary size to its
> original value, we move the nested classes outside of ComputedStyleBase.
> If this succeeds, we will put these classes in a "detail" namespace to
> discourage their use externally.
> 
> Diff of generated files:
> https://gist.github.com/darrnshn/7d475a02af6f5d57b4a1622721111cba/revisions
> 
> BUG=718888
> 
> Review-Url: https://codereview.chromium.org/2869613002
> Cr-Commit-Position: refs/heads/master@{#469911}
> Committed: https://chromium.googlesource.com/chromium/src/+/a0fc01a3bcb06cac6e10e6eaf2930b1a0fdb73cc

TBR=nainar@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=718888
Review-Url: https://codereview.chromium.org/2871793002
Cr-Commit-Position: refs/heads/master@{#470150}
Committed: https://chromium.googlesource.com/chromium/src/+/73b8f7ed8d1105af3d39563f30a2771aee24923f

[shend, 2017-05-08 22:19:03]

Created Revert of Move nested classes in ComputedStyleBase outside.

[shend, 2017-05-08 22:19:13]

The CQ bit was checked by shend@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-05-08 22:19:58]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-08 22:21:24]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-05-08 22:21:25]

Dry run: This issue passed the CQ dry run.

[nainar, 2017-05-08 23:29:14]

rs lgtm

[shend, 2017-05-08 23:32:42]

The CQ bit was checked by shend@chromium.org

[commit-bot: I haz the power, 2017-05-08 23:47:59]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-09 00:00:02]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1494286362185230, "parent_rev":
"52eb504ead78db774e2e21307e6322c1f7ce867f", "commit_rev":
"73b8f7ed8d1105af3d39563f30a2771aee24923f"}

[commit-bot: I haz the power, 2017-05-09 00:00:19]

Description was changed from

==========
Revert of Move nested classes in ComputedStyleBase outside. (patchset #1 id:1 of
https://codereview.chromium.org/2869613002/ )

Reason for revert:
Did not decrease binary size.

Original issue's description:
> Move nested classes in ComputedStyleBase outside.
> 
> Currently, groups such as StyleSurroundData are stored as nested classes
> in ComputedStyleBase. It is suspected that this is causing an increase
> in binary size. In an atttempt to restore the binary size to its
> original value, we move the nested classes outside of ComputedStyleBase.
> If this succeeds, we will put these classes in a "detail" namespace to
> discourage their use externally.
> 
> Diff of generated files:
> https://gist.github.com/darrnshn/7d475a02af6f5d57b4a1622721111cba/revisions
> 
> BUG=718888
> 
> Review-Url: https://codereview.chromium.org/2869613002
> Cr-Commit-Position: refs/heads/master@{#469911}
> Committed:
https://chromium.googlesource.com/chromium/src/+/a0fc01a3bcb06cac6e10e6eaf293...

TBR=nainar@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=718888
==========

to

==========
Revert of Move nested classes in ComputedStyleBase outside. (patchset #1 id:1 of
https://codereview.chromium.org/2869613002/ )

Reason for revert:
Did not decrease binary size.

Original issue's description:
> Move nested classes in ComputedStyleBase outside.
> 
> Currently, groups such as StyleSurroundData are stored as nested classes
> in ComputedStyleBase. It is suspected that this is causing an increase
> in binary size. In an atttempt to restore the binary size to its
> original value, we move the nested classes outside of ComputedStyleBase.
> If this succeeds, we will put these classes in a "detail" namespace to
> discourage their use externally.
> 
> Diff of generated files:
> https://gist.github.com/darrnshn/7d475a02af6f5d57b4a1622721111cba/revisions
> 
> BUG=718888
> 
> Review-Url: https://codereview.chromium.org/2869613002
> Cr-Commit-Position: refs/heads/master@{#469911}
> Committed:
https://chromium.googlesource.com/chromium/src/+/a0fc01a3bcb06cac6e10e6eaf293...

TBR=nainar@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=718888

Review-Url: https://codereview.chromium.org/2871793002
Cr-Commit-Position: refs/heads/master@{#470150}
Committed:
https://chromium.googlesource.com/chromium/src/+/73b8f7ed8d1105af3d39563f30a2...
==========

[commit-bot: I haz the power, 2017-05-09 00:00:20]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/73b8f7ed8d1105af3d39563f30a2...