cros: Convert SystemTrayDelegate::ManageBluetoothDevices to mojo for mash

ash/common/system/chromeos/bluetooth/tray_bluetooth.cc

Index: ash/common/system/chromeos/bluetooth/tray_bluetooth.cc
diff --git a/ash/common/system/chromeos/bluetooth/tray_bluetooth.cc b/ash/common/system/chromeos/bluetooth/tray_bluetooth.cc
index 08adff62477101a4c49788bc53f443fee6fdb0cc..6eb6aac83fbb3f9ac7680dd7503c6f7f251a44e9 100644
--- a/ash/common/system/chromeos/bluetooth/tray_bluetooth.cc
+++ b/ash/common/system/chromeos/bluetooth/tray_bluetooth.cc
@@ -7,6 +7,7 @@
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/system/tray/hover_highlight_view.h"
 #include "ash/common/system/tray/system_tray.h"
+#include "ash/common/system/tray/system_tray_controller.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/system/tray/system_tray_notifier.h"
 #include "ash/common/system/tray/throbber_view.h"
@@ -487,7 +488,7 @@ class BluetoothDetailedView : public TrayDetailsView {
 
   void ShowSettings() {
     if (TrayPopupUtils::CanOpenWebUISettings(login_)) {
-      WmShell::Get()->system_tray_delegate()->ManageBluetoothDevices();
+      WmShell::Get()->system_tray_controller()->ShowBluetoothSettings();
       owner()->system_tray()->CloseSystemBubble();
     }
   }