content: Cleanup class/struct forward declarations

content/browser/bluetooth/bluetooth_device_chooser_controller.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_BLUETOOTH_DEVICE_CHOOSER_CONTROLLER_H_
 #define CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_DEVICE_CHOOSER_CONTROLLER_H_
 
 #include <string>
 
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/bluetooth_chooser.h"
 #include "third_party/WebKit/public/platform/modules/bluetooth/web_bluetooth.mojom.h"
 
 namespace device {
 class BluetoothAdapter;
 class BluetoothDevice;
-class BluetoothDiscoveryFilter;
 class BluetoothDiscoverySession;
 }
 
 namespace content {
 
 class RenderFrameHost;
 class WebContents;
 class WebBluetoothServiceImpl;
 
 // Class that interacts with a chooser and starts a bluetooth discovery session.
@@ skipping 118 matching lines @@
   // Weak pointer factory for generating 'this' pointers that might live longer
   // than we do.
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<BluetoothDeviceChooserController> weak_ptr_factory_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_DEVICE_CHOOSER_CONTROLLER_H_