Better way to implement FrameConnectedBluetoothDevicesTest

content/browser/bluetooth/web_bluetooth_service_impl.h

 // Copyright 2016 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_BROWSER_BLUETOOTH_WEB_BLUETOOTH_SERVICE_IMPL_H_
 #define CONTENT_BROWSER_BLUETOOTH_WEB_BLUETOOTH_SERVICE_IMPL_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 25 matching lines @@
 // Implementation of Mojo WebBluetoothService located in
 // third_party/WebKit/public/platform/modules/bluetooth.
 // It handles Web Bluetooth API requests coming from Blink / renderer
 // process and uses the platform abstraction of device/bluetooth.
 // WebBluetoothServiceImpl is not thread-safe and should be created on the
 // UI thread as required by device/bluetooth.
 // This class is instantiated on-demand via Mojo's ConnectToRemoteService
 // from the renderer when the first Web Bluetooth API request is handled.
 // RenderFrameHostImpl will create an instance of this class and keep
 // ownership of it.
-class WebBluetoothServiceImpl : public blink::mojom::WebBluetoothService,
-                                public WebContentsObserver,
-                                public device::BluetoothAdapter::Observer {
+class CONTENT_EXPORT WebBluetoothServiceImpl
+    : public NON_EXPORTED_BASE(blink::mojom::WebBluetoothService),
+      public WebContentsObserver,
+      public device::BluetoothAdapter::Observer {
  public:
   // |render_frame_host|: The RFH that owns this instance.
   // |request|: The instance will be bound to this request's pipe.
   WebBluetoothServiceImpl(RenderFrameHost* render_frame_host,
                           blink::mojom::WebBluetoothServiceRequest request);
   ~WebBluetoothServiceImpl() override;
 
   // Sets the connection error handler for WebBluetoothServiceImpl's Binding.
   void SetClientConnectionErrorHandler(base::Closure closure);
 
  private:
+  friend class FrameConnectedBluetoothDevicesTest;
   typedef base::Callback<void(device::BluetoothDevice*)>
       PrimaryServicesRequestCallback;
 
   // WebContentsObserver:
   // These functions should always check that the affected RenderFrameHost
   // is this->render_frame_host_ and not some other frame in the same tab.
   void DidFinishNavigation(NavigationHandle* navigation_handle) override;
 
   // BluetoothAdapter::Observer:
   void AdapterPresentChanged(device::BluetoothAdapter* adapter,
@@ skipping 145 matching lines @@
   mojo::Binding<blink::mojom::WebBluetoothService> binding_;
 
   base::WeakPtrFactory<WebBluetoothServiceImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebBluetoothServiceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BLUETOOTH_WEB_BLUETOOTH_SERVICE_IMPL_H_