Revert of Make CSSFontFace::willUseFontData() load fonts with unicode-range

Revert of Make CSSFontFace::willUseFontData() load fonts with unicode-range (https://codereview.chromium.org/248473005/)

Reason for revert:
Causes off-by-one text errors, e.g. SHOP->RGNO

BUG=369633
Original issue's description:
> Make CSSFontFace::willUseFontData() load fonts with unicode-range
> 
> Before this patch CSSFontFace::willUseFontData() loads font faces that
> have no unicode-range. Since font faces with no unicode-range tends to
> be used as fallback font of segmented font family, this behavior leads
> to unnecessary font downloads.
> 
> This patch makes willUseFontData() loads the first unloaded font face
> whose unicode-range intersects with given text. That check does not
> need to be 100% precise (false negative is ok), so it only checks the
> first character of the text, for speed.
> 
> TEST=fast/css/font-face-unicode-range-overlap-load.html
> BUG=247920, 246492
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=172943

TBR=dglazkov@chromium.org,eae@chromium.org,ksakamoto@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=247920, 246492
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=173234

[enne (OOO), 2014-05-02 21:42:17]

Created Revert of Make CSSFontFace::willUseFontData() load fonts with
unicode-range

[commit-bot: I haz the power, 2014-05-02 21:42:29]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/enne@chromium.org/261753011/1

[commit-bot: I haz the power, 2014-05-02 21:43:34]

Change committed as 173234

[eae, 2014-05-02 21:44:06]

LGTM