Avoid redundant ceilToFloat call in RenderBlock

R=leviw@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/15991003

git-svn-id: svn://svn.chromium.org/blink/trunk@152006 bbb929c8-8fbe-4397-9dbb-9b2b20218538
1 file changed