Revert of Remove build_overrides/v8.gni.

Revert of Remove build_overrides/v8.gni. (patchset #2 id:20001 of https://codereview.chromium.org/2660523002/ )

Reason for revert:
build_overrides/v8.gni is still used by clank/java/BUILD.gn

Original issue's description:
> Remove build_overrides/v8.gni.
> 
> This is no longer used by V8 and has been replaced by the default_args variable
> in the //.gn file.
> 
> BUG=684096
> 
> Review-Url: https://codereview.chromium.org/2660523002
> Cr-Commit-Position: refs/heads/master@{#448749}
> Committed: https://chromium.googlesource.com/chromium/src/+/e97ef561379aadc367fcde3ebc5b37fa4001796f

TBR=machenbach@chromium.org,brettw@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=684096
Review-Url: https://codereview.chromium.org/2684833002
Cr-Commit-Position: refs/heads/master@{#448813}
Committed: https://chromium.googlesource.com/chromium/src/+/3273e13c90a9aca77955c9a386bc66f57dded38f

[mthiesse, 2017-02-08 00:13:51]

The CQ bit was checked by mthiesse@chromium.org

[mthiesse, 2017-02-08 00:13:52]

Created Revert of Remove build_overrides/v8.gni.

[commit-bot: I haz the power, 2017-02-08 00:14:38]

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, 2017-02-08 00:15:37]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1486512831722330, "parent_rev":
"c111c32b26969977d27a4ee212963a943e298cec", "commit_rev":
"3273e13c90a9aca77955c9a386bc66f57dded38f"}

[commit-bot: I haz the power, 2017-02-08 00:16:18]

Description was changed from

==========
Revert of Remove build_overrides/v8.gni. (patchset #2 id:20001 of
https://codereview.chromium.org/2660523002/ )

Reason for revert:
build_overrides/v8.gni is still used by clank/java/BUILD.gn

Original issue's description:
> Remove build_overrides/v8.gni.
> 
> This is no longer used by V8 and has been replaced by the default_args
variable
> in the //.gn file.
> 
> BUG=684096
> 
> Review-Url: https://codereview.chromium.org/2660523002
> Cr-Commit-Position: refs/heads/master@{#448749}
> Committed:
https://chromium.googlesource.com/chromium/src/+/e97ef561379aadc367fcde3ebc5b...

TBR=machenbach@chromium.org,brettw@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=684096
==========

to

==========
Revert of Remove build_overrides/v8.gni. (patchset #2 id:20001 of
https://codereview.chromium.org/2660523002/ )

Reason for revert:
build_overrides/v8.gni is still used by clank/java/BUILD.gn

Original issue's description:
> Remove build_overrides/v8.gni.
> 
> This is no longer used by V8 and has been replaced by the default_args
variable
> in the //.gn file.
> 
> BUG=684096
> 
> Review-Url: https://codereview.chromium.org/2660523002
> Cr-Commit-Position: refs/heads/master@{#448749}
> Committed:
https://chromium.googlesource.com/chromium/src/+/e97ef561379aadc367fcde3ebc5b...

TBR=machenbach@chromium.org,brettw@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=684096

Review-Url: https://codereview.chromium.org/2684833002
Cr-Commit-Position: refs/heads/master@{#448813}
Committed:
https://chromium.googlesource.com/chromium/src/+/3273e13c90a9aca77955c9a386bc...
==========

[commit-bot: I haz the power, 2017-02-08 00:16:19]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/3273e13c90a9aca77955c9a386bc...

[Michael Achenbach, 2017-02-08 07:36:48]

lgtm