Bluetooth: register agent when we have an adapter

device/bluetooth/bluetooth_adapter_chromeos.h

Index: device/bluetooth/bluetooth_adapter_chromeos.h
diff --git a/device/bluetooth/bluetooth_adapter_chromeos.h b/device/bluetooth/bluetooth_adapter_chromeos.h
index a7afdc8a9d250c22fba50467600e1a8c886037e7..f9e5ea2627c9c44a05f2d11751643279ff790ef0 100644
--- a/device/bluetooth/bluetooth_adapter_chromeos.h
+++ b/device/bluetooth/bluetooth_adapter_chromeos.h
@@ -126,9 +126,6 @@ class BluetoothAdapterChromeOS
                                 const ConfirmationCallback& callback) OVERRIDE;
   virtual void Cancel() OVERRIDE;
 
-  // PairingContext is an API between BluetoothAdapterChromeOS and
-  // BluetoothDeviceChromeOS for a single pairing attempt, wrapping the
-  // callbacks of the underlying BluetoothAgentServiceProvider object.
   // Called by dbus:: on completion of the D-Bus method call to register the
   // pairing agent.
   void OnRegisterAgent();