Remove unused complex text fallback logic on Android

Remove unused complex text fallback logic

The original logic was needed when we used old harfbuzz and didn't have
per-character font fallback machanism.

First part for bug 236464. The other part is to remove
FontCache::createFontPlatformData and related functions once Skia removes
the extra fallback logic in SkTypeface::CreateFromName.

BUG=236464
TEST=Results of layout tests about writing-mode, rtl, arabic, etc. should not be changed.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=149627

[jamesr, 2013-05-02 23:22:55]

I'm not really an expert on this but lgtm as far as I can tell.

Do we have any sort of automated testing for the complex text paths on android?

[Xianzhu, 2013-05-02 23:28:39]

On 2013/05/02 23:22:55, jamesr wrote:
> I'm not really an expert on this but lgtm as far as I can tell.
> 
> Do we have any sort of automated testing for the complex text paths on
android?

Yes, there are several layout tests. Will modify the description to include
them.

[jamesr, 2013-05-02 23:38:30]

But do they run anywhere?

[Xianzhu, 2013-05-02 23:49:37]

On 2013/05/02 23:38:30, jamesr wrote:
> But do they run anywhere?

For now layout tests on Android are broken and are not ran or results are not
checked on bots. Eventually this will be fixed.

The code to be removed deals with special font names set by the old
ComplexFontDataHarfBuzz which had been removed, so the code is never executed
now so will change nothing if removed.

The Skia function called from the code has been removed in the newest Skia. The
next roll of skia depends on this change.

[commit-bot: I haz the power, 2013-05-03 00:44:06]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/wangxianzhu@chromium.org/14649013/1

[commit-bot: I haz the power, 2013-05-03 01:12:17]

Change committed as 149627