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

content/shell/browser/layout_test/layout_test_first_device_bluetooth_chooser.h

 // 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.
 
 #ifndef CONTENT_SHELL_BROWSER_LAYOUT_TEST_LAYOUT_TEST_FIRST_DEVICE_BLUETOOTH_CHOOSER_H_
 #define CONTENT_SHELL_BROWSER_LAYOUT_TEST_LAYOUT_TEST_FIRST_DEVICE_BLUETOOTH_CHOOSER_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 13 matching lines @@
   ~LayoutTestFirstDeviceBluetoothChooser() override;
 
   // BluetoothChooser:
   void SetAdapterPresence(AdapterPresence presence) override;
   void ShowDiscoveryState(DiscoveryState state) override;
   void AddOrUpdateDevice(const std::string& device_id,
                          bool should_update_name,
                          const base::string16& device_name,
                          bool is_gatt_connected,
                          bool is_paired,
-                         const int8_t* rssi) override;
+                         int signal_strength_level) override;
   void RemoveDevice(const std::string& device_id) override {}
 
  private:
   EventHandler event_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(LayoutTestFirstDeviceBluetoothChooser);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_BROWSER_LAYOUT_TEST_LAYOUT_TEST_FIRST_DEVICE_BLUETOOTH_CHOOSER_H_