Add Device Policy Handler for Bluetooth, and allow disabling the Bluetooth adapter on Chrome OS

device/bluetooth/bluetooth_adapter.h

Index: device/bluetooth/bluetooth_adapter.h
diff --git a/device/bluetooth/bluetooth_adapter.h b/device/bluetooth/bluetooth_adapter.h
index 5dcf12f54bd9104841fab75bb62fed94b0ffb951..1b35de42fad3602431577a4d7173701cbb811f6b 100644
--- a/device/bluetooth/bluetooth_adapter.h
+++ b/device/bluetooth/bluetooth_adapter.h
@@ -260,6 +260,11 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothAdapter
   // is only considered present if the address has been obtained.
   virtual bool IsPresent() const = 0;
 
+#if defined(OS_CHROMEOS)

[scheib, 2016/04/12 19:20:39]

Explain here why this is only ChromeOS.

[Andrew T Wilson (Slow), 2016/04/13 13:55:11]

Or just make it on all platforms - the API and implementation seems reasonable
to have as part of the bluetooth adapter everywhere.

[Ivan Šandrk, 2016/04/13 17:19:04]

Done.

[Ivan Šandrk, 2016/04/13 17:19:04]

Made it available on all platforms.

[scheib, 2016/04/13 19:45:41]

But not implemented there, thus the try job failures. Also, the scope of this
would increase considerably to actually make the other platforms able to be
disabled.

[Ivan Šandrk, 2016/04/14 18:08:47]

That's a very good point. My apologies for pushing code that wasn't working, I
just wanted to see what the trybots had to say, shouldn't have sent it out for
reviews. Reverted the change (cros only again), and added a comment explaining
why it's cros only.

+  // Disables Bluetooth completely without shutting it down.
+  virtual void SetDisabled(bool disabled) = 0;
+#endif
+
   // Indicates whether the adapter radio is powered.
   virtual bool IsPowered() const = 0;