Check if box-orient is working in <button>. See https://bugs.webkit.org/show_bug.cgi?id=25406

reference of horizontal button:
hello world

reference of vertical button:
hello
world

default:

hello
world

horizontal:

hello
world

vertical:

hello
world

default => vertical:

hello
world

vertical => horizontal:

hello
world

PASS default height 
PASS horizontal height 
PASS vertical height 
PASS toHorizontal height 
PASS toVertical height