Handle exceptions thrown when shelling out the editor

Handle exceptions thrown when shelling out svn commit

So temporary files aren't left around.

R=dpranke@chromium.org
BUG=
TEST=


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=112358

[Dirk Pranke, 2011-11-30 22:09:18]

change looks fine, but your description is wrong, isn't it? this is shelling out
to svn commit, not the editor.

lgtm w/ an updated description.

[M-A Ruel, 2011-12-01 00:35:52]

On 2011/11/30 22:09:18, Dirk Pranke wrote:
> change looks fine, but your description is wrong, isn't it? this is shelling
out
> to svn commit, not the editor.
> 
> lgtm w/ an updated description.

Ugh, thanks

[commit-bot: I haz the power, 2011-12-01 00:36:20]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/maruel@chromium.org/8758004/2001

[commit-bot: I haz the power, 2011-12-01 00:42:57]

Change committed as 112358