Adding missing wgl_api_unittest.cc to Windows gn build

Adding missing wgl_api_unittest.cc to Windows gn build

BUG=604060
Committed: https://crrev.com/a456f5bda5a89dbe92a59b96a43c3e8dbf59a77d
Cr-Commit-Position: refs/heads/master@{#394818}

[brucedawson, 2016-05-19 17:31:18]

brucedawson@chromium.org changed reviewers:
+ kbr@chromium.org

[brucedawson, 2016-05-19 17:31:18]

Just adding the last few unit tests that are missing from the Windows gn build.
PTAL.

[Ken Russell (switch to Gerrit), 2016-05-19 17:45:47]

lgtm

How'd you find the missing file?

[brucedawson, 2016-05-19 17:52:55]

On 2016/05/19 17:45:47, Ken Russell wrote:
> lgtm
> 
> How'd you find the missing file?

I've been comparing the compilation steps between gyp and gn, focusing on
*test*.cc.

[brucedawson, 2016-05-19 17:53:04]

The CQ bit was checked by brucedawson@chromium.org

[commit-bot: I haz the power, 2016-05-19 17:53:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1996083002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1996083002/1

[commit-bot: I haz the power, 2016-05-19 18:33:07]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-19 18:34:30]

Description was changed from

==========
Adding missing wgl_api_unittest.cc to Windows gn build

BUG=604060
==========

to

==========
Adding missing wgl_api_unittest.cc to Windows gn build

BUG=604060

Committed: https://crrev.com/a456f5bda5a89dbe92a59b96a43c3e8dbf59a77d
Cr-Commit-Position: refs/heads/master@{#394818}
==========

[commit-bot: I haz the power, 2016-05-19 18:34:31]

Patchset 1 (id:??) landed as
https://crrev.com/a456f5bda5a89dbe92a59b96a43c3e8dbf59a77d
Cr-Commit-Position: refs/heads/master@{#394818}