bluetooth: BluetoothAdapterDeleter used to control BluetoothAdapter destruction.

device/bluetooth/bluetooth_adapter_win.cc

Index: device/bluetooth/bluetooth_adapter_win.cc
diff --git a/device/bluetooth/bluetooth_adapter_win.cc b/device/bluetooth/bluetooth_adapter_win.cc
index db4e644533093d43c952a5d7df8ee581cf319fe3..bb66dfdb0db97d958a2f7f99baec2ce4bc5ae461 100644
--- a/device/bluetooth/bluetooth_adapter_win.cc
+++ b/device/bluetooth/bluetooth_adapter_win.cc
@@ -8,6 +8,7 @@
 #include <string>
 #include <utility>
 
+#include "base/location.h"
 #include "base/logging.h"
 #include "base/sequenced_task_runner.h"
 #include "base/single_thread_task_runner.h"
@@ -282,6 +283,12 @@ void BluetoothAdapterWin::DevicesPolled(
   }
 }
 
+void BluetoothAdapterWin::DeleteOnCorrectThread() const {
+  if (ui_task_runner_->RunsTasksOnCurrentThread() ||
+      !ui_task_runner_->DeleteSoon(FROM_HERE, this))
+    delete this;
+}
+
 // If the method is called when |discovery_status_| is DISCOVERY_STOPPING,
 // starting again is handled by BluetoothAdapterWin::DiscoveryStopped().
 void BluetoothAdapterWin::AddDiscoverySession(