Fix V8 lockup on debugger disconnect

Inline CloseSession() and remove call to Join() to avoid joining ourselves on disconnect.  This fixes a lockup when the USB cable is disconnected from a cellphone, etc..


BUG=
TEST=

[catid, 2012-05-22 18:09:24]

This is a bugfix for an issue we were having with V8.  Hope it helps other
people too!

Best,
Chris

[yangguo, 2012-05-23 07:59:16]

On 2012/05/22 18:09:24, catid wrote:
> This is a bugfix for an issue we were having with V8.  Hope it helps other
> people too!
> 
> Best,
> Chris

Thank you for your contribution! Please sign the CLA (electronically) so we can
use your code: http://code.google.com/legal/individual-cla-v1.0.html

[catid, 2012-05-23 15:26:33]

Signed it
-Chris

On Wed, May 23, 2012 at 12:59 AM, <yangguo@chromium.org> wrote:

> On 2012/05/22 18:09:24, catid wrote:
>
>> This is a bugfix for an issue we were having with V8.  Hope it helps
>>
> other
>
>> people too!
>>
>
>  Best,
>> Chris
>>
>
> Thank you for your contribution! Please sign the CLA (electronically) so
> we can use your code:
>
http://code.google.com/legal/**individual-cla-v1.0.html<http://code.google.co...
>
>
https://codereview.appspot.**com/6230045/<https://codereview.appspot.com/6230...
>

[yangguo, 2012-06-04 08:58:11]

On 2012/05/23 15:26:33, catid wrote:
> Signed it
> -Chris
> 
> On Wed, May 23, 2012 at 12:59 AM, <mailto:yangguo@chromium.org> wrote:
> 
> > On 2012/05/22 18:09:24, catid wrote:
> >
> >> This is a bugfix for an issue we were having with V8.  Hope it helps
> >>
> > other
> >
> >> people too!
> >>
> >
> >  Best,
> >> Chris
> >>
> >
> > Thank you for your contribution! Please sign the CLA (electronically) so
> > we can use your code:
> >
>
http://code.google.com/legal/**individual-cla-v1.0.html%3Chttp://code.google....>
> >
> >
>
https://codereview.appspot.**com/6230045/%3Chttps://codereview.appspot.com/62...>
> >

LGTM. Landing.

[yangguo, 2012-06-04 09:01:11]

On 2012/06/04 08:58:11, yangguo wrote:
> On 2012/05/23 15:26:33, catid wrote:
> > Signed it
> > -Chris
> > 
> > On Wed, May 23, 2012 at 12:59 AM, <mailto:yangguo@chromium.org> wrote:
> > 
> > > On 2012/05/22 18:09:24, catid wrote:
> > >
> > >> This is a bugfix for an issue we were having with V8.  Hope it helps
> > >>
> > > other
> > >
> > >> people too!
> > >>
> > >
> > >  Best,
> > >> Chris
> > >>
> > >
> > > Thank you for your contribution! Please sign the CLA (electronically) so
> > > we can use your code:
> > >
> >
>
http://code.google.com/legal/**individual-cla-v1.0.html%253Chttp://code.googl...>
> > >
> > >
> >
>
https://codereview.appspot.**com/6230045/%253Chttps://codereview.appspot.com/...>
> > >
> 
> LGTM. Landing.

I moved this CL to the correct rietveld:
http://codereview.chromium.org/10479009/