Fix vertical CJK ideographics alignment issue on Linux/Android.

Vertical CJK ideographics are drawn horizontally to keep their original
orientation. However, the ascent is applied vertically as in horizontal
text which is incorrect (making the ideographics look shifted to the
bottom-right direction).

Compensate the position of vertical CJK ideographics so that the ascent
will look like to be applied horizontally.

BUG=297729
TEST=Existing fast/writing-mode/vertical-baseline-alignment.html and fast/text/justify-ideograph-vertical.html rebaselined on linux.

Review URL: https://chromiumcodereview.appspot.com/24658002

git-svn-id: svn://svn.chromium.org/blink/trunk@158413 bbb929c8-8fbe-4397-9dbb-9b2b20218538