[Chromoting] Disable warning for unused strings in resources.

[Chromoting] Disable warning for unused strings in resources.

With the additional targets in Chromoting (Android, iOS and AppRemoting), the
check to verify that each string is being used produces lots of noise because
it is difficult to identify which strings should be used in each target.

It is non-trivial to handle all these cases cleanly with our current approach
so we'll need to disable these checks and re-visit how we want to handle
them.

BUG=448175
Committed: https://crrev.com/b7e9e03aefb4b14071acef9028cecafb5a4db35f
Cr-Commit-Position: refs/heads/master@{#311574}

[garykac, 2015-01-13 17:43:27]

garykac@chromium.org changed reviewers:
+ jamiewalch@chromium.org

[Jamie, 2015-01-14 19:41:19]

lgtm

[garykac, 2015-01-14 22:46:09]

The CQ bit was checked by garykac@chromium.org

[commit-bot: I haz the power, 2015-01-14 22:47:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/848043002/1

[commit-bot: I haz the power, 2015-01-14 23:52:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-14 23:53:29]

Patchset 1 (id:??) landed as
https://crrev.com/b7e9e03aefb4b14071acef9028cecafb5a4db35f
Cr-Commit-Position: refs/heads/master@{#311574}