Ammend font table data experiment on Mac.

Ammend font table data experiment on Mac.

Calling CGFontCopyTableForTag did not affect the runtime results,
so try to actually access the data to see if that makes a
difference.

TBR=reed1
This is a test change, allow data to be collected.

Committed: https://skia.googlesource.com/skia/+/94164944f88972e7fd555170ca94536a70db1515

[bungeman-skia, 2015-04-10 16:00:12]

bungeman@google.com changed reviewers:
+ reed@google.com

[bungeman-skia, 2015-04-10 16:00:12]

This is a follow on. The existing code here didn't make a difference, leading me
to believe that when issue happen the data is already gone. This attempts to
actually read the data, so hopefully with this change the current reports stop,
and all new reports will point at this new read code. If so, then we've at least
narrowed it down to an invalid data from a request, and not just something which
happens later.

[bungeman-skia, 2015-04-10 21:22:17]

The CQ bit was checked by bungeman@google.com to run a CQ dry run

[commit-bot: I haz the power, 2015-04-10 21:22:54]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1076183004/1

[commit-bot: I haz the power, 2015-04-10 21:34:47]

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

[commit-bot: I haz the power, 2015-04-10 21:34:48]

Try jobs failed on following builders:
  Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-Shared-Trybot on client.skia
(JOB_FAILED,
http://build.chromium.org/p/client.skia/builders/Test-Ubuntu-GCC-GCE-CPU-AVX2...)

[bungeman-skia, 2015-04-10 22:27:30]

The CQ bit was checked by bungeman@google.com

[commit-bot: I haz the power, 2015-04-10 22:28:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1076183004/1

[commit-bot: I haz the power, 2015-04-10 22:35:27]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/94164944f88972e7fd555170ca94536a70db1515