Add PDB files for content_gl_tests.

Add PDB files for content_gl_tests.

Needed for symbolized stack traces on Windows, to understand why other
CLs are causing crashes.

BUG=502353
TBR=maruel@chromium.org

Committed: https://crrev.com/cef8c85a29e52ba8f4a848906a8eb4140e02c90d
Cr-Commit-Position: refs/heads/master@{#336310}

[Ken Russell (switch to Gerrit), 2015-06-26 00:05:18]

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

[Ken Russell (switch to Gerrit), 2015-06-26 00:05:18]

FYI. I'm CQ'ing this TBR'd as I've tested it locally and it's likely to help
debugging the crashes seen in https://codereview.chromium.org/1203513004/ ,
which are so far only being seen on the bots.

[Ken Russell (switch to Gerrit), 2015-06-26 00:05:30]

The CQ bit was checked by kbr@chromium.org

[commit-bot: I haz the power, 2015-06-26 00:05:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1213693003/1

[commit-bot: I haz the power, 2015-06-26 01:20:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-26 01:21:18]

Patchset 1 (id:??) landed as
https://crrev.com/cef8c85a29e52ba8f4a848906a8eb4140e02c90d
Cr-Commit-Position: refs/heads/master@{#336310}

[Marc-Antoine Ruel (Google), 2015-06-26 02:07:33]

maruel@google.com changed reviewers:
+ maruel@google.com

[Marc-Antoine Ruel (Google), 2015-06-26 02:07:33]

lgtm