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This appears to have broken gfx_unittests on iOS:

http://build.chromium.org/p/chromium.mac/builders/iOS%20Simulator%20%28dbg%29/builds/17689

> Update iOS deployment target to 7.0
> 
> iOS 6 will no longer be supported.
> 
> Replaces deprecated sizeWithFont: with sizeWithAttributes: (adding a
> ceilf since according to the internet, the former rounds up, and the
> latter does not) to fix compilation.
> 
> BUG=402921
> 
> Review URL: https://codereview.chromium.org/463333002

TBR=stuartmorgan@chromium.org

Review URL: https://codereview.chromium.org/473883002

Cr-Commit-Position: refs/heads/master@{#289510}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289510 0039d316-1c4b-4281-b951-d872f2087c98