Remove obsolete friend declarations for MSVC.

Remove obsolete friend declarations for MSVC.

These friend declarations were added because MSVC had a bug around the
visibility of nested classes. They are no longer necessary.

BUG=617504
Committed: https://crrev.com/8b06121b2024e23574d9f8423a326368e6cf6313
Cr-Commit-Position: refs/heads/master@{#398181}

[Yuta Kitamura, 2016-06-06 07:39:30]

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

[commit-bot: I haz the power, 2016-06-06 07:39:48]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2043633002/1

[commit-bot: I haz the power, 2016-06-06 09:10:22]

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

[commit-bot: I haz the power, 2016-06-06 09:10:23]

Dry run: This issue passed the CQ dry run.

[Yuta Kitamura, 2016-06-06 09:21:32]

yutak@chromium.org changed reviewers:
+ kbr@chromium.org, tzik@chromium.org

[Yuta Kitamura, 2016-06-06 09:21:32]

yutak@chromium.org changed required reviewers:
+ tzik@chromium.org

[Yuta Kitamura, 2016-06-06 09:21:33]

tzik & kbr: PTAL?
+kbr for approval in platform/graphics/.

[tzik, 2016-06-06 09:36:08]

lgtm

[Ken Russell (switch to Gerrit), 2016-06-06 23:10:21]

lgtm

[Yuta Kitamura, 2016-06-07 00:55:58]

The CQ bit was checked by yutak@chromium.org

[commit-bot: I haz the power, 2016-06-07 00:56:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2043633002/1

[commit-bot: I haz the power, 2016-06-07 01:03:23]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-07 01:04:30]

Description was changed from

==========
Remove obsolete friend declarations for MSVC.

These friend declarations were added because MSVC had a bug around the
visibility of nested classes. They are no longer necessary.

BUG=617504
==========

to

==========
Remove obsolete friend declarations for MSVC.

These friend declarations were added because MSVC had a bug around the
visibility of nested classes. They are no longer necessary.

BUG=617504

Committed: https://crrev.com/8b06121b2024e23574d9f8423a326368e6cf6313
Cr-Commit-Position: refs/heads/master@{#398181}
==========

[commit-bot: I haz the power, 2016-06-07 01:04:31]

Patchset 1 (id:??) landed as
https://crrev.com/8b06121b2024e23574d9f8423a326368e6cf6313
Cr-Commit-Position: refs/heads/master@{#398181}