Revert of Use SkTypeface::getBounds() in bounding-box calculations.

Revert of Use SkTypeface::getBounds() in bounding-box calculations. (patchset #3 id:40001 of https://codereview.chromium.org/680363003/)

Reason for revert:
http://build.chromium.org/p/client.skia/builders/Test-Win7-ShuttleA-HD2000-x86-Debug/builds/97/steps/nanobench/logs/stdio

Original issue's description:
> Use SkTypeface::getBounds() in bounding-box calculations.
> 
> This should produce tighter conservative bounding boxes for text than the
> approximation code it replaces.
> 
> Recording performance is neutral on my desktop.  Playback performance
> improves by up to 15% on text heavy pages, e.g.
> 
>   desk_pokemonwiki.skp_1 3.24ms -> 2.83ms  0.87x
>         desk_baidu.skp_1 1.91ms -> 1.58ms  0.83x
> 
> Committed: https://skia.googlesource.com/skia/+/bf8dc343df4fbdcb8af546eb68b640e011a33489

TBR=reed@google.com,mtklein@chromium.org
NOTREECHECKS=true
NOTRY=true

Committed: https://skia.googlesource.com/skia/+/27f965a577262deb9182c6935f3af05bb52b817c

[mtklein, 2014-10-29 15:32:22]

Created Revert of Use SkTypeface::getBounds() in bounding-box calculations.

[commit-bot: I haz the power, 2014-10-29 15:33:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/685173002/1

[commit-bot: I haz the power, 2014-10-29 15:33:43]

Committed patchset #1 (id:1) as 27f965a577262deb9182c6935f3af05bb52b817c