bluetooth: guard adapter_ in destructor

bluetooth: guard adapter_ in destructor

Since we don't set adapter_ early, it's possible for the destructor
to be called without it ever being initialized. Guard that call.

BUG=none
TEST=emerge chromeos-chrome

Change-Id: I64724c3bf7272b9d5588713872627462ebcbe878

R=jhawkins@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=126946

[James Hawkins, 2012-03-15 17:19:06]

https://chromiumcodereview.appspot.com/9702076/diff/1/chrome/browser/ui/webui...
File chrome/browser/ui/webui/options2/chromeos/bluetooth_options_handler2.cc
(right):

https://chromiumcodereview.appspot.com/9702076/diff/1/chrome/browser/ui/webui...
chrome/browser/ui/webui/options2/chromeos/bluetooth_options_handler2.cc:62: if
(adapter_.get())
Optional nit: You can leave off the .get().

[commit-bot: I haz the power, 2012-03-15 17:22:59]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a lowly provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[James Hawkins, 2012-03-15 17:24:06]

Sorry, LGTM

[commit-bot: I haz the power, 2012-03-15 17:30:16]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/keybuk@chromium.org/9702076/1

[keybuk, 2012-03-15 17:30:32]

:) I'm going to keep the .get() there, because it matches the rest of the code
which uses it - internal consistency and all that

(and I can never remember which of scoped_refptr<> scoped_ptr<> etc. need get
vs. don't)