Reland of [Presentation API] Convert presentation.mojom to new wrapper types.

Reland of [Presentation API] Convert presentation.mojom to new wrapper types. (patchset #1 id:1 of https://codereview.chromium.org/2196143002/ )

Reason for revert:
Didn't work. NaCl still crashing. Sadness :(

Original issue's description:
> Revert of [Presentation API] Convert presentation.mojom to new wrapper types. (patchset #5 id:80001 of https://codereview.chromium.org/2181163003/ )
>
> Reason for revert:
> Suspect (not the first) for widespread NaCl test failures since
> https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%281%29/builds/55504
>
> Errors like
>
> [4224:3200:0729/162247:ERROR:nacl_process_host.cc(337)] NaCl process exited with status -1073741674 (0xc0000096)
> ...
>   Actual: "Plugin crashed. 'NaCl module crashed'"
>
> Wasn't r408782 or r408787. Running out of candidates..
>
> Original issue's description:
> > [Presentation API] Convert presentation.mojom to new wrapper types.
> >
> > This converts presentation.mojom to use the new (std::) Mojo wrapper types:
> > mojo::String => std::string
> > mojo::Array => std::vector
> >
> > No behavior changes should ensue.
> >
> > Optional values are represented as base::Optional<Foo> with the new wrapper
> > types requiring some additional changes.
> >
> > This work will simplify further changes for crbug.com/627655.
> >
> > BUG=627655
> >
> > Committed: https://crrev.com/59e7b40948030815a49af887b922b370ba048b8b
> > Cr-Commit-Position: refs/heads/master@{#408781}
>
> TBR=dcheng@chromium.org,imcheng@chromium.org,mfoltz@chromium.org
> NOTRY=true
> BUG=627655
>
> Committed: https://crrev.com/43c746be32b2bfce5c3fd654894e4b7f7bf6387f
> Cr-Commit-Position: refs/heads/master@{#408905}

TBR=dcheng@chromium.org,imcheng@chromium.org,mfoltz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=627655
Committed: https://crrev.com/8f125bddde53e2988f244ec4e31a92d247340488
Cr-Commit-Position: refs/heads/master@{#408910}

[tapted, 2016-08-01 04:50:32]

The CQ bit was checked by tapted@chromium.org

[tapted, 2016-08-01 04:50:33]

Created Reland of [Presentation API] Convert presentation.mojom to new wrapper
types.

[commit-bot: I haz the power, 2016-08-01 04:50:45]

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, 2016-08-01 04:51:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-01 04:53:22]

Description was changed from

==========
Reland of [Presentation API] Convert presentation.mojom to new wrapper types.
(patchset #1 id:1 of https://codereview.chromium.org/2196143002/ )

Reason for revert:
Didn't work. NaCl still crashing. Sadness :(

Original issue's description:
> Revert of [Presentation API] Convert presentation.mojom to new wrapper types.
(patchset #5 id:80001 of https://codereview.chromium.org/2181163003/ )
> 
> Reason for revert:
> Suspect (not the first) for widespread NaCl test failures since
>
https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%281%29/bui...
> 
> Errors like
> 
> [4224:3200:0729/162247:ERROR:nacl_process_host.cc(337)] NaCl process exited
with status -1073741674 (0xc0000096)
> ...
>   Actual: "Plugin crashed. 'NaCl module crashed'"
> 
> Wasn't r408782 or r408787. Running out of candidates..
> 
> Original issue's description:
> > [Presentation API] Convert presentation.mojom to new wrapper types.
> >
> > This converts presentation.mojom to use the new (std::) Mojo wrapper types:
> > mojo::String => std::string
> > mojo::Array => std::vector
> >
> > No behavior changes should ensue.
> >
> > Optional values are represented as base::Optional<Foo> with the new wrapper
> > types requiring some additional changes.
> >
> > This work will simplify further changes for crbug.com/627655.
> >
> > BUG=627655
> >
> > Committed: https://crrev.com/59e7b40948030815a49af887b922b370ba048b8b
> > Cr-Commit-Position: refs/heads/master@{#408781}
> 
> TBR=dcheng@chromium.org,imcheng@chromium.org,mfoltz@chromium.org
> NOTRY=true
> BUG=627655
> 
> Committed: https://crrev.com/43c746be32b2bfce5c3fd654894e4b7f7bf6387f
> Cr-Commit-Position: refs/heads/master@{#408905}

TBR=dcheng@chromium.org,imcheng@chromium.org,mfoltz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=627655
==========

to

==========
Reland of [Presentation API] Convert presentation.mojom to new wrapper types.
(patchset #1 id:1 of https://codereview.chromium.org/2196143002/ )

Reason for revert:
Didn't work. NaCl still crashing. Sadness :(

Original issue's description:
> Revert of [Presentation API] Convert presentation.mojom to new wrapper types.
(patchset #5 id:80001 of https://codereview.chromium.org/2181163003/ )
>
> Reason for revert:
> Suspect (not the first) for widespread NaCl test failures since
>
https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%281%29/bui...
>
> Errors like
>
> [4224:3200:0729/162247:ERROR:nacl_process_host.cc(337)] NaCl process exited
with status -1073741674 (0xc0000096)
> ...
>   Actual: "Plugin crashed. 'NaCl module crashed'"
>
> Wasn't r408782 or r408787. Running out of candidates..
>
> Original issue's description:
> > [Presentation API] Convert presentation.mojom to new wrapper types.
> >
> > This converts presentation.mojom to use the new (std::) Mojo wrapper types:
> > mojo::String => std::string
> > mojo::Array => std::vector
> >
> > No behavior changes should ensue.
> >
> > Optional values are represented as base::Optional<Foo> with the new wrapper
> > types requiring some additional changes.
> >
> > This work will simplify further changes for crbug.com/627655.
> >
> > BUG=627655
> >
> > Committed: https://crrev.com/59e7b40948030815a49af887b922b370ba048b8b
> > Cr-Commit-Position: refs/heads/master@{#408781}
>
> TBR=dcheng@chromium.org,imcheng@chromium.org,mfoltz@chromium.org
> NOTRY=true
> BUG=627655
>
> Committed: https://crrev.com/43c746be32b2bfce5c3fd654894e4b7f7bf6387f
> Cr-Commit-Position: refs/heads/master@{#408905}

TBR=dcheng@chromium.org,imcheng@chromium.org,mfoltz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=627655

Committed: https://crrev.com/8f125bddde53e2988f244ec4e31a92d247340488
Cr-Commit-Position: refs/heads/master@{#408910}
==========

[commit-bot: I haz the power, 2016-08-01 04:53:23]

Patchset 1 (id:??) landed as
https://crrev.com/8f125bddde53e2988f244ec4e31a92d247340488
Cr-Commit-Position: refs/heads/master@{#408910}