Revert of Use BBH reserve hook to preallocate space for tiles.

Revert of Use BBH reserve hook to preallocate space for tiles. (patchset #2 id:80001 of https://codereview.chromium.org/639823005/)

Reason for revert:
failed assertion "fXTiles * fYTiles != 0"

Original issue's description:
> Use BBH reserve hook to preallocate space for tiles.
> 
> Before getting too far into changing how SkTileGrid stores its tiles, I figured I'd
> better see how much I can tweak out the existing format.  Cleverly, that way
> any improvements I make by changing the format will look that much less
> impressive.
> 
> This CL looks like it will be a 5-15% win in time spent recording, with no effect
> on playback.
> 
> This CL also shrinks the tiles to fit exactly when we're done inserting,
> using newly added SkTDArray::shrinkToFit().  It's quite cheap to run (maybe
> taking back 1-2% from those 5-15% wins), and means we'll lug around about 15%
> fewer bytes in the tile grids.  Note though this strategy temporarily uses up to
> 30% more memory while building the tile grid.  For our largest SKPs, that's 
> maybe 75-100K extra.
> 
> BUG=skia:
> 
> Committed: https://skia.googlesource.com/skia/+/52455cbc02d7f480d988ae7cdacc11ad69078c2c

TBR=reed@google.com,robertphillips@google.com,mtklein@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Committed: https://skia.googlesource.com/skia/+/7062a262e27d89411a7b6bcc0162d230a2b2e36c

[mtklein, 2014-10-09 20:54:41]

Created Revert of Use BBH reserve hook to preallocate space for tiles.

[commit-bot: I haz the power, 2014-10-09 20:55:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/642933002/1

[commit-bot: I haz the power, 2014-10-09 20:55:27]

Committed patchset #1 (id:1) as 7062a262e27d89411a7b6bcc0162d230a2b2e36c