Have all skia platforms share FontPlatformData::hash() implementation

Have all skia platforms share FontPlatformData::hash() implementation

Update Windows to use a SkTypeface based hash value for FontPlatformData
when the non-GDI path is used. Move the existing implementation from
FontPlatformDataHarfBuzz to FontPlatformDataSkia to allow and to ensure
that all skia platforms share the same implementation.

Also, rename m_size to m_textSiz for FontPlatformDataChromiumWin to be
consistent with the other platforms.

R=bungeman@chromium.org
BUG=249099
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=158495

[eseidel, 2013-09-27 21:33:36]

lgtm

[commit-bot: I haz the power, 2013-09-27 21:33:52]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/eae@chromium.org/24874002/9001

[commit-bot: I haz the power, 2013-09-28 04:17:30]

Commit queue rejected this change because the description was changed
between the time the change entered the commit queue and the time it
was ready to commit. You can safely check the commit box again.

[commit-bot: I haz the power, 2013-09-28 16:07:41]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/eae@chromium.org/24874002/9001

[commit-bot: I haz the power, 2013-09-28 16:08:15]

Change committed as 158495