bluetooth: Refactor bluetooth_adapter.cc for C++ style: dcl/dfn ordering.

bluetooth: Refactor bluetooth_adapter.cc for C++ style: dcl/dfn ordering.

Refactoring in preparation of additional code changes to BluetoothAdapter
before implementing an Android version.

No code line changes, only moved definition blocks to match declaration order:
https://google-styleguide.googlecode.com/svn/trunk/cppguide.html#Declaration_Order

BUG=471536
Committed: https://crrev.com/546156371290ca98828b0edfbb3125840da0969e
Cr-Commit-Position: refs/heads/master@{#326168}

[scheib, 2015-04-21 00:29:28]

scheib@chromium.org changed reviewers:
+ armansito@chromium.org

[armansito, 2015-04-21 23:09:02]

This kind of refactors really pollute the history and harder to find things in a
git blame. Just FYI.

lgtm

[scheib, 2015-04-21 23:16:28]

On 2015/04/21 23:09:02, armansito wrote:
> This kind of refactors really pollute the history and harder to find things in
a
> git blame. Just FYI.
> 
> lgtm

Thanks. Yes, I'm aware, and believe the trade off is correct.

[scheib, 2015-04-21 23:16:37]

The CQ bit was checked by scheib@chromium.org

[commit-bot: I haz the power, 2015-04-21 23:19:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1096183003/1

[commit-bot: I haz the power, 2015-04-21 23:24:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-21 23:25:42]

Patchset 1 (id:??) landed as
https://crrev.com/546156371290ca98828b0edfbb3125840da0969e
Cr-Commit-Position: refs/heads/master@{#326168}