Change complex-text-missing-glyph-fallback to have fixed line height

Change complex-text-missing-glyph-fallback to have fixed line height

Change the fast/text/international/complex-text-missing-glyph-fallback
.html test to have a fixed line height to account for differences
between fonts.

BUG=378610
TBR=leviw@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=176053

[eae, 2014-06-12 18:41:08]

The CQ bit was checked by eae@chromium.org

[commit-bot: I haz the power, 2014-06-12 18:42:10]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/eae@chromium.org/336603004/1

[commit-bot: I haz the power, 2014-06-12 19:28:07]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_blink_dbg on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_blink_dbg/builds/1...)
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/11798)

[commit-bot: I haz the power, 2014-06-12 21:41:13]

Change committed as 176053