Revert of Base: add Optional<T>.

Revert of Base: add Optional<T>. (patchset #15 id:280001 of https://codereview.chromium.org/1245163002/ )

Reason for revert:
Unit tests failing on Windows-7-SP1.

https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%281%29/builds/47913

Original issue's description:
> Base: add Optional<T>.
>
> This is an implementation of the C++17 std::optional<> feature:
> http://en.cppreference.com/w/cpp/utility/optional
>
> Chromium documentation:
> https://chromium.googlesource.com/chromium/src/+/master/docs/optional.md
>
> BUG=521269
>
> Committed: https://crrev.com/8756e4f20df53bbb7fbb49b2ca19fda93a95bdb4
> Cr-Commit-Position: refs/heads/master@{#388187}

TBR=danakj@chromium.org,dcheng@chromium.org,dmazzoni@chromium.org,horo@chromium.org,shivanisha@chromium.org,thakis@chromium.org,wfh@chromium.org,mlamouri@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=521269
Committed: https://crrev.com/77d44abe31b14e212cf9728b86054ae811fe3fdf
Cr-Commit-Position: refs/heads/master@{#388216}

[cmumford, 2016-04-19 15:59:12]

Created Revert of Base: add Optional<T>.

[commit-bot: I haz the power, 2016-04-19 15:59:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1902833002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1902833002/1

[commit-bot: I haz the power, 2016-04-19 15:59:51]

Description was changed from

==========
Revert of Base: add Optional<T>. (patchset #15 id:280001 of
https://codereview.chromium.org/1245163002/ )

Reason for revert:
Unit tests failing on Windows-7-SP1.

https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%2...

Original issue's description:
> Base: add Optional<T>.
> 
> This is an implementation of the C++17 std::optional<> feature:
> http://en.cppreference.com/w/cpp/utility/optional
> 
> Chromium documentation:
> https://chromium.googlesource.com/chromium/src/+/master/docs/optional.md
> 
> BUG=521269
> 
> Committed: https://crrev.com/8756e4f20df53bbb7fbb49b2ca19fda93a95bdb4
> Cr-Commit-Position: refs/heads/master@{#388187}

TBR=danakj@chromium.org,dcheng@chromium.org,dmazzoni@chromium.org,horo@chromi...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=521269
==========

to

==========
Revert of Base: add Optional<T>. (patchset #15 id:280001 of
https://codereview.chromium.org/1245163002/ )

Reason for revert:
Unit tests failing on Windows-7-SP1.

https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%2...

Original issue's description:
> Base: add Optional<T>.
> 
> This is an implementation of the C++17 std::optional<> feature:
> http://en.cppreference.com/w/cpp/utility/optional
> 
> Chromium documentation:
> https://chromium.googlesource.com/chromium/src/+/master/docs/optional.md
> 
> BUG=521269
> 
> Committed: https://crrev.com/8756e4f20df53bbb7fbb49b2ca19fda93a95bdb4
> Cr-Commit-Position: refs/heads/master@{#388187}

TBR=danakj@chromium.org,dcheng@chromium.org,dmazzoni@chromium.org,horo@chromi...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=521269
==========

[commit-bot: I haz the power, 2016-04-19 15:59:52]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-22 19:12:35]

Description was changed from

==========
Revert of Base: add Optional<T>. (patchset #15 id:280001 of
https://codereview.chromium.org/1245163002/ )

Reason for revert:
Unit tests failing on Windows-7-SP1.

https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%2...

Original issue's description:
> Base: add Optional<T>.
> 
> This is an implementation of the C++17 std::optional<> feature:
> http://en.cppreference.com/w/cpp/utility/optional
> 
> Chromium documentation:
> https://chromium.googlesource.com/chromium/src/+/master/docs/optional.md
> 
> BUG=521269
> 
> Committed: https://crrev.com/8756e4f20df53bbb7fbb49b2ca19fda93a95bdb4
> Cr-Commit-Position: refs/heads/master@{#388187}

TBR=danakj@chromium.org,dcheng@chromium.org,dmazzoni@chromium.org,horo@chromi...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=521269
==========

to

==========
Revert of Base: add Optional<T>. (patchset #15 id:280001 of
https://codereview.chromium.org/1245163002/ )

Reason for revert:
Unit tests failing on Windows-7-SP1.

https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%2...

Original issue's description:
> Base: add Optional<T>.
>
> This is an implementation of the C++17 std::optional<> feature:
> http://en.cppreference.com/w/cpp/utility/optional
>
> Chromium documentation:
> https://chromium.googlesource.com/chromium/src/+/master/docs/optional.md
>
> BUG=521269
>
> Committed: https://crrev.com/8756e4f20df53bbb7fbb49b2ca19fda93a95bdb4
> Cr-Commit-Position: refs/heads/master@{#388187}

TBR=danakj@chromium.org,dcheng@chromium.org,dmazzoni@chromium.org,horo@chromi...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=521269

Committed: https://crrev.com/77d44abe31b14e212cf9728b86054ae811fe3fdf
Cr-Commit-Position: refs/heads/master@{#388216}
==========

[commit-bot: I haz the power, 2016-04-22 19:12:36]

Patchset 1 (id:??) landed as
https://crrev.com/77d44abe31b14e212cf9728b86054ae811fe3fdf
Cr-Commit-Position: refs/heads/master@{#388216}