Revert of Restore text alloc optimizations. (patchset #4 of https://codereview.chromium.org/466363009/)

Reason for revert:
GM failures on http://108.170.220.120:10115/builders/Test-Ubuntu12-ShuttleA-GTX660-x86-Release/builds/1867/

Original issue's description:
> Restore text vertex buffer alloc and other optimizations.
>
> Modifies the fontcache GM to ensure that the font cache is forced to flush.
>
> Committed: https://skia.googlesource.com/skia/+/9c3d24b9d1ba3d955094ff0cb1ba2d11e1c1adca

R=bsalomon@google.com, robertphillips@google.com, jvanverth@google.com
TBR=bsalomon@google.com, jvanverth@google.com, robertphillips@google.com
NOTREECHECKS=true
NOTRY=true

Author: djsollen@google.com

Review URL: https://codereview.chromium.org/510103003
6 files changed