arc: bluetooth: Don't unset bluetooth_adapter_

components/arc/bluetooth/arc_bluetooth_bridge.cc

Index: components/arc/bluetooth/arc_bluetooth_bridge.cc
diff --git a/components/arc/bluetooth/arc_bluetooth_bridge.cc b/components/arc/bluetooth/arc_bluetooth_bridge.cc
index 5042636b7465a062c41a05f768b4253c6e6f05a4..cd0c770f0e88108a60c3f1128cbf7e968f0edeb3 100644
--- a/components/arc/bluetooth/arc_bluetooth_bridge.cc
+++ b/components/arc/bluetooth/arc_bluetooth_bridge.cc
@@ -107,7 +107,6 @@ void ArcBluetoothBridge::AdapterPresentChanged(BluetoothAdapter* adapter,
   // If the adapter goes away, remove ourselves as an observer.
   if (!present && adapter == bluetooth_adapter_) {
     adapter->RemoveObserver(this);
-    bluetooth_adapter_ = nullptr;

[Luis Héctor Chávez, 2016/07/22 01:53:24]

is it guaranteed that the adapter (reference) will never change? if so, nit:

if (present || adapter != bluetooth_adapter_)
  return;
adapter->RemoveObserver(this);

   }
 }