Use dart:io directory deletion instead of starting a process.

Use dart:io directory deletion instead of starting a process.

Bill, Eric, is this path ever hit at this point. It seems to me
that it was only hit when dartc produced output to be run in
a browser. If that is the case, could one of you remove all the
code that has to do with the temporary directory handling as
a follow-up change?

R=zundel@google.com,whesse@google.com
BUG=1211
TEST=

Committed: https://code.google.com/p/dart/source/detail?r=5748

[zundel, 2012-03-18 16:02:42]

dartc may still creates a directory for incremental build and some optional
build output.  If you don't pass it an optional --work directory it may try to
create a directory called 'out' in the cwd

[Mads Ager (google), 2012-03-21 14:32:10]

Bill, could you have a look please?

[zundel, 2012-03-21 14:34:17]

On 2012/03/21 14:32:10, Mads Ager wrote:
> Bill, could you have a look please?

I think we are going to take out this writing of artifacts after talking with
Dan R. yesterday, so you could leave a TODO(zundel): in there for me if you
want.

[Mads Ager (google), 2012-03-21 14:37:41]

On 2012/03/21 14:34:17, zundel wrote:
> On 2012/03/21 14:32:10, Mads Ager wrote:
> > Bill, could you have a look please?
> 
> I think we are going to take out this writing of artifacts after talking with
> Dan R. yesterday, so you could leave a TODO(zundel): in there for me if you
> want.

Thanks Eric. I'm perfectly happy with having this code in the system. I just had
trouble hitting this path. :)

My main concern here is to get rid of the spawning of an "rm -rf" process that
will only work on Linux and Mac.

[Søren Gjesse, 2012-03-22 08:21:17]

lgtm