Add landmine for 2013 switch

R=iannucci@chromium.org
BUG=309197, 323300

Review URL: https://codereview.chromium.org/141583006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245713 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245713
Fix gfx::Tween tests for 32 bit official build

Fix in r245343 did not work as expected.

It turns out the previous fix only worked when building in debug. Optimized
code removed the store to variable instructions which caused rounding from
80-bit to 64-bit float representation. The rounded value was then truncated.

TESTED: Ran official build in release and now working.

https://codereview.chromium.org/135643006/

BUG=334475

Review URL: https://codereview.chromium.org/131413004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245714 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245714