webtry: Only create sqlite3 tables if they don't exist yet.

webtry: Only create sqlite3 tables if they don't exist yet.

Otherwise it will through an error like the following:

2014/09/28 21:22:24 Info: status creating sqlite table for sources:
"table source_images already exists"
2014/09/28 21:22:24 Info: status creating sqlite table for webtry:
"table webtry already exists"
2014/09/28 21:22:24 Info: status creating sqlite table for workspace:
"table workspace already exists"
2014/09/28 21:22:24 Info: status creating sqlite table for workspace
try: "table workspacetry already exists"

To test locally the following was done:

$ ./gyp_skia gyp/webtry.gyp gyp/most.gyp -Dskia_gpu=0
$ ninja -C out/Debug webtry
$ cd experimental/webtry
$ go get -d
$ go build webtry.go
$ ./webtry
$ google-chrome http://localhost:8000

Expected: see no more the above messages.

BUG=None
TEST=see above
R=jcgregorio@google.com

Committed: https://skia.googlesource.com/skia/+/fffa16cc277c286687b0f42a7cc87217dd94938e

[jcgregorio, 2014-09-29 15:07:57]

jcgregorio@google.com changed reviewers:
+ stephana@google.com
- jcgregorio@google.com

[jcgregorio, 2014-09-29 15:08:21]

jcgregorio@google.com changed reviewers:
+ jcgregorio@google.com

[jcgregorio, 2014-09-29 15:08:21]

Adding stephana as he has plans regarding our handling of SQL.

[tfarina, 2014-09-30 13:27:23]

Ping?

Remember that this is 'webtry' only.

Not 'perf' for the moment since Stephan is working on this in CL ->
https://codereview.chromium.org/608273002/

Thanks,

[jcgregorio, 2014-09-30 15:00:24]

On 2014/09/30 13:27:23, tfarina wrote:
> Ping?
> 
> Remember that this is 'webtry' only.
> 
> Not 'perf' for the moment since Stephan is working on this in CL ->
> https://codereview.chromium.org/608273002/
> 
> Thanks,

LGTM

[jcgregorio, 2014-09-30 15:08:16]

The CQ bit was checked by jcgregorio@google.com

[commit-bot: I haz the power, 2014-09-30 15:08:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/613593002/1

[commit-bot: I haz the power, 2014-09-30 15:17:14]

Committed patchset #1 (id:1) as fffa16cc277c286687b0f42a7cc87217dd94938e