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

Review URL: https://codereview.chromium.org/261753011

git-svn-id: svn://svn.chromium.org/blink/trunk@173234 bbb929c8-8fbe-4397-9dbb-9b2b20218538