Fix official Mac build for strict virtual annotations check.

Fix official Mac build for strict virtual annotations check.

BUG=417463
Committed: https://crrev.com/b342dc7032ce1287ae587e9db769f169806fc39d
Cr-Commit-Position: refs/heads/master@{#311354}

[dcheng, 2015-01-13 21:51:41]

dcheng@chromium.org changed reviewers:
+ thakis@chromium.org

[Nico, 2015-01-13 21:52:47]

lgtm

(how long was this broken?)

[dcheng, 2015-01-13 21:52:52]

https://codereview.chromium.org/848963002/diff/1/chrome/browser/component_upd...
File chrome/browser/component_updater/widevine_cdm_component_installer.cc
(right):

https://codereview.chromium.org/848963002/diff/1/chrome/browser/component_upd...
chrome/browser/component_updater/widevine_cdm_component_installer.cc:237:
~WidevineCdmComponentInstallerTraits() override {}
Note: I left this due to the discussion on
https://codereview.chromium.org/826213004 (namely, to guarantee this class has a
virtual dtor), but I don't know how important it is--the base class already has
a virtual dtor.

[dcheng, 2015-01-13 21:53:58]

Mac switch hasn't been flipped yet =)

[dcheng, 2015-01-13 21:55:21]

The CQ bit was checked by dcheng@chromium.org

[commit-bot: I haz the power, 2015-01-13 21:56:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/848963002/1

[commit-bot: I haz the power, 2015-01-13 22:57:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-13 22:58:41]

Patchset 1 (id:??) landed as
https://crrev.com/b342dc7032ce1287ae587e9db769f169806fc39d
Cr-Commit-Position: refs/heads/master@{#311354}