Make content shell on android support relaunching.

Make content shell on android support relaunching.

Without this change, the content shell would crash after pressing back
to the home screen and relaunching.  The two problems this fixes are:

1.) It was trying to initialize the command line even though it already
    was init'ed before.
2.) The shell wasn't being recreated because it is done during process
    start and the process is already running.

BUG=
TEST=


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=148365

[Jay Civelli, 2012-07-23 21:13:22]

lgtm

[commit-bot: I haz the power, 2012-07-24 23:42:22]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tedchoc@chromium.org/10701177/4001

[commit-bot: I haz the power, 2012-07-24 23:42:28]

Presubmit check for 10701177-4001 failed and returned exit status 1.

Running presubmit commit checks ...

** Presubmit Messages **
If this change has an associated bug, add BUG=[bug number].

If this change requires manual test instructions to QA team, add
TEST=[instructions].

** Presubmit ERRORS **
Missing LGTM from an OWNER for files in these directories:
    content/public/android

[Ted C, 2012-07-24 23:43:13]

@Yaron, looks like I'll need an lgtm from you as well.

[Yaron, 2012-07-24 23:48:37]

rubberstamping. Jay should be in OWNERS

[Yaron, 2012-07-24 23:48:47]

LGTM

[commit-bot: I haz the power, 2012-07-25 16:39:39]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tedchoc@chromium.org/10701177/4001

[commit-bot: I haz the power, 2012-07-25 18:12:21]

Change committed as 148365