Use Scoped COM helpers for collecting GPU information

Use Scoped COM helpers for collecting GPU information

Change explicit COM functions to use the scoped helpers from
base::win, ensuring that releasing happens in the proper order.

R=zmo,kbr
BUG=none
TEST=none

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=131479

[Ryan Sleevi, 2012-04-07 06:08:27]

zmo: PTAL (and see e-mail). If this can result in a real bug, can you also file
a bug with steps to repro or test?

[Zhenyao Mo, 2012-04-09 17:38:52]

LGTM

[commit-bot: I haz the power, 2012-04-09 17:42:40]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rsleevi@chromium.org/10022011/1

[commit-bot: I haz the power, 2012-04-09 17:42:42]

Presubmit check for 10022011-1 failed and returned exit status 1.

Running presubmit commit checks ...

** Presubmit ERRORS **
Missing LGTM from an OWNER for files in these directories:
    content/gpu

Was the presubmit check useful? Please send feedback & hate mail to
maruel@chromium.org!

[Ryan Sleevi, 2012-04-09 17:55:49]

kbr: TBR

[commit-bot: I haz the power, 2012-04-09 17:56:03]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rsleevi@chromium.org/10022011/1

[commit-bot: I haz the power, 2012-04-09 18:26:34]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rsleevi@chromium.org/10022011/6003

[commit-bot: I haz the power, 2012-04-09 20:38:44]

Try job failure for 10022011-6003 (retry) on win_rel for step
"content_unittests".
It's a second try, previously, step "content_unittests" failed.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[Ken Russell (switch to Gerrit), 2012-04-09 22:06:57]

OWNERS lgtm