remove (dead) SK_SUPPORT_LEGACY_PIXELREF_UNFLATTENABLE flag

remove (dead) SK_SUPPORT_LEGACY_PIXELREF_UNFLATTENABLE flag

BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=281841

[reed1, 2014-07-08 16:31:55]

The CQ bit was checked by reed@google.com

[commit-bot: I haz the power, 2014-07-08 16:32:38]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/reed@google.com/379603003/1

[commit-bot: I haz the power, 2014-07-08 16:32:39]

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

[commit-bot: I haz the power, 2014-07-08 16:32:40]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[reed1, 2014-07-08 16:32:48]

in service of https://codereview.chromium.org/372303002/ which will land after
this CL

[f(malita), 2014-07-08 16:33:21]

lgtm

[commit-bot: I haz the power, 2014-07-08 18:52:25]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_chromium_x64_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_x64_rel/...)

[commit-bot: I haz the power, 2014-07-08 21:54:43]

Change committed as 281841