ui: Use RectF::x/y/right/bottom for rect conversions.

R=danakj
BUG=

Review URL: https://codereview.chromium.org/14195014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@194750 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed