Add PRESUBMIT.py to tools/sharding_supervisor/

Add PRESUBMIT.py to tools/sharding_supervisor/

While it's being deleted relatively soon, it's easier to have checks in.

R=csharp@chromium.org
BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=179444

[csharp, 2013-01-29 01:34:18]

https://codereview.chromium.org/12079037/diff/1/tools/sharding_supervisor/sha...
File tools/sharding_supervisor/sharding_supervisor.py (right):

https://codereview.chromium.org/12079037/diff/1/tools/sharding_supervisor/sha...
tools/sharding_supervisor/sharding_supervisor.py:258: buf = StdioBuffer(shard)
Why change buffer to buf?

https://codereview.chromium.org/12079037/diff/1/tools/sharding_supervisor/std...
File tools/sharding_supervisor/stdio_buffer.py (right):

https://codereview.chromium.org/12079037/diff/1/tools/sharding_supervisor/std...
tools/sharding_supervisor/stdio_buffer.py:21: buf = cStringIO.StringIO()
Why buffer to buf?

[M-A Ruel, 2013-01-29 01:36:40]

https://codereview.chromium.org/12079037/diff/1/tools/sharding_supervisor/sha...
File tools/sharding_supervisor/sharding_supervisor.py (right):

https://codereview.chromium.org/12079037/diff/1/tools/sharding_supervisor/sha...
tools/sharding_supervisor/sharding_supervisor.py:258: buf = StdioBuffer(shard)
On 2013/01/29 01:34:18, csharp wrote:
> Why change buffer to buf?

buffer is a builtin, so this code is aliasing it;
http://docs.python.org/2/library/functions.html#buffer

[csharp, 2013-01-29 01:37:26]

Ah, LGTM

[commit-bot: I haz the power, 2013-01-29 01:41:09]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/maruel@chromium.org/12079037/1

[commit-bot: I haz the power, 2013-01-29 02:15:58]

Sorry for I got bad news for ya.
Compile failed with a clobber build on mac.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=mac&number...
Your code is likely broken or HEAD is junk. Please ensure your
code is not broken then alert the build sheriffs.
Look at the try server FAQ for more details.

[commit-bot: I haz the power, 2013-01-29 15:23:59]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/maruel@chromium.org/12079037/1

[commit-bot: I haz the power, 2013-01-29 16:00:05]

Sorry for I got bad news for ya.
Compile failed with a clobber build on win.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win&number...
Your code is likely broken or HEAD is junk. Please ensure your
code is not broken then alert the build sheriffs.
Look at the try server FAQ for more details.

[commit-bot: I haz the power, 2013-01-29 21:25:13]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/maruel@chromium.org/12079037/1