Add lua scripts for generating n-grams from SKPs

Add lua scripts for generating n-grams from SKPs

BUG=skia:3840
Committed: https://skia.googlesource.com/skia/+/93558dc74be4a92a8dfba87fcffd4441a37c0fc8

[borenet, 2015-06-25 14:28:09]

borenet@google.com changed reviewers:
+ jcgregorio@google.com, rmistry@google.com

[jcgregorio, 2015-06-25 14:39:58]

lgtm

[borenet, 2015-06-25 14:41:30]

The CQ bit was checked by borenet@google.com

[jcgregorio, 2015-06-25 14:41:38]

On 2015/06/25 at 14:39:58, jcgregorio wrote:
> lgtm

Are you sure you want the scripts in the main repo and not the infra repo?

[commit-bot: I haz the power, 2015-06-25 14:41:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1204283002/20001

[rmistry, 2015-06-25 14:42:31]

On 2015/06/25 at 14:41:38, jcgregorio wrote:
> On 2015/06/25 at 14:39:58, jcgregorio wrote:
> > lgtm
> 
> Are you sure you want the scripts in the main repo and not the infra repo?

There are already lua scripts in the main repo's tools/lua so it makes sense to
keep them there for now.

[borenet, 2015-06-25 14:42:53]

On 2015/06/25 at 14:41:38, jcgregorio wrote:
> On 2015/06/25 at 14:39:58, jcgregorio wrote:
> > lgtm
> 
> Are you sure you want the scripts in the main repo and not the infra repo?

It seems like the right place to me.  You need to compile and use lua_pictures
from the Skia repo in order to run this locally, plus there are other Lua
scripts in this directory.

[commit-bot: I haz the power, 2015-06-25 14:47:45]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/93558dc74be4a92a8dfba87fcffd4441a37c0fc8