Add signal strength indicator icon to WebBluetooth chooser on non-Mac desktops

content/shell/browser/layout_test/layout_test_first_device_bluetooth_chooser.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/shell/browser/layout_test/layout_test_first_device_bluetooth_chooser.h"
 
 #include "base/logging.h"
 
 namespace content {
 
@@ skipping 33 matching lines @@
       break;
   }
 }
 
 void LayoutTestFirstDeviceBluetoothChooser::AddOrUpdateDevice(
     const std::string& device_id,
     bool should_update_name,
     const base::string16& deviceName,
     bool is_gatt_connected,
     bool is_paired,
-    const int8_t* rssi) {
+    int signal_strength_level) {
   event_handler_.Run(Event::SELECTED, device_id);
 }
 
 }  // namespace content