Revert of Change growth function for SkWriter32 (https://codereview.chromium.org/150663014/)

Reason for revert:
See https://codereview.chromium.org/152703007/.

Original issue's description:
> Change growth function for SkWriter32
>
> Add setCountExact to SkTDArray to allow external control of array growth.
> Use it to allow SkWriter to control the buffer growth pattern.
> Change buffer growth pattern to 1.5n+4096
>
> BUG=skia:2125
>
> Committed: http://code.google.com/p/skia/source/detail?r=13401

R=tomhudson@google.com, reed@google.com, iancottrell@google.com
TBR=iancottrell@google.com, reed@google.com, tomhudson@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:2125

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/132313013

git-svn-id: http://skia.googlecode.com/svn/trunk@13406 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed