Revert of Modify sample buffer size for larger displays.

Revert of Modify sample buffer size for larger displays. (https://codereview.chromium.org/240433002/)

Reason for revert:
This also changes verylargebitmap, and the difference appears to be meaningful. Henrik, I have emailed you the images that differ.

Original issue's description:
> Modify sample buffer size for larger displays.
> 
> Increases the intermediate buffer size for sample pixel indexes,
> used in the sample proc function calls. If the operation is bigger
> than the buffer it's split into multiple calls, creating overhead.
> This would especially impact the performance of SIMD optimizations.
> Also, aligns the start address of the buffer to 16 bytes, to enable
> more efficient SIMD optimizations.
> 
> Author: henrik.smiding@intel.com
> 
> Signed-off-by: Henrik Smiding <henrik.smiding@intel.com>;
> 
> Committed: http://code.google.com/p/skia/source/detail?r=14825
> 
> Committed: http://code.google.com/p/skia/source/detail?r=14872

TBR=reed@google.com
NOTREECHECKS=true
NOTRY=true

Committed: http://code.google.com/p/skia/source/detail?r=14878

[scroggo, 2014-05-23 19:11:20]

Created Revert of Modify sample buffer size for larger displays.

[commit-bot: I haz the power, 2014-05-23 19:12:08]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/scroggo@google.com/294023016/1

[commit-bot: I haz the power, 2014-05-23 19:12:09]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-05-23 19:12:09]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[scroggo, 2014-05-23 19:13:26]

The CQ bit was checked by scroggo@google.com

[commit-bot: I haz the power, 2014-05-23 19:13:50]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/scroggo@google.com/294023016/1

[commit-bot: I haz the power, 2014-05-23 19:14:02]

Change committed as 14878