bluetooth: Move requestDevice() to UI thread.

content/browser/bluetooth/bluetooth_dispatcher_host.cc

Index: content/browser/bluetooth/bluetooth_dispatcher_host.cc
diff --git a/content/browser/bluetooth/bluetooth_dispatcher_host.cc b/content/browser/bluetooth/bluetooth_dispatcher_host.cc
index c054e14237f3bd4deb49711f065f1f75587801cc..d8f0b29a68316fc8afa228e2bc001249a3015f63 100644
--- a/content/browser/bluetooth/bluetooth_dispatcher_host.cc
+++ b/content/browser/bluetooth/bluetooth_dispatcher_host.cc
@@ -66,6 +66,14 @@ void BluetoothDispatcherHost::set_adapter(
 
 void BluetoothDispatcherHost::OnRequestDevice(int thread_id, int request_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  BrowserThread::PostTask(BrowserThread::UI,
+                          FROM_HERE,
+                          base::Bind(&BluetoothDispatcherHost::OnRequestDeviceUI,
+                                     this, thread_id, request_id));
+}
+
+void BluetoothDispatcherHost::OnRequestDeviceUI(int thread_id, int request_id) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   // TODO(scheib) Extend this very simple mock implementation by using
   // device/bluetooth/test mock adapter and related classes.
   switch (bluetooth_mock_data_set_) {