Avoid DCHECK on 3x scaled screens.

Avoid DCHECK on 3x scaled screens.

As a temporary solution, use 2x assets on 3x screens.

BUG=413300
Committed: https://crrev.com/e16fd72864e815f3e952c29acf99b1bf6d438e86
Cr-Commit-Position: refs/heads/master@{#294434}

[lliabraa, 2014-09-11 17:19:24]

lliabraa@chromium.org changed reviewers:
+ rohitrao@chromium.org

[lliabraa, 2014-09-11 17:19:24]

@rohitrao for iOS review.

[rohitrao (ping after 24h), 2014-09-11 17:26:28]

rohitrao@chromium.org changed reviewers:
+ tony@chromium.org

[rohitrao (ping after 24h), 2014-09-11 17:26:28]

LGTM

+tony for OWNERS

We have not yet created 300P assets, which is why we've coded it to fall back to
200P for now.  Explicitly separating out the 300P conditional case felt clearer
than just modifying the DCHECK.

[tony, 2014-09-11 17:32:10]

LGTM

[lliabraa, 2014-09-11 17:34:27]

The CQ bit was checked by lliabraa@chromium.org

[commit-bot: I haz the power, 2014-09-11 17:40:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/563713003/1

[commit-bot: I haz the power, 2014-09-11 18:53:01]

Committed patchset #1 (id:1) as e85117d8232d883ba3b4f6d60a76323d31479f5c

[commit-bot: I haz the power, 2014-09-11 19:09:20]

Patchset 1 (id:??) landed as
https://crrev.com/e16fd72864e815f3e952c29acf99b1bf6d438e86
Cr-Commit-Position: refs/heads/master@{#294434}