device: Cleanup class/struct forward declarations

device/bluetooth/test/bluetooth_test_android.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 DEVICE_BLUETOOTH_TEST_BLUETOOTH_TEST_ANDROID_H_
 #define DEVICE_BLUETOOTH_TEST_BLUETOOTH_TEST_ANDROID_H_
 
 #include <stdint.h>
 
 #include "base/android/scoped_java_ref.h"
 #include "device/bluetooth/test/bluetooth_test.h"
 
 namespace device {
 
-class BluetoothAdapterAndroid;
-
 // Android implementation of BluetoothTestBase.
 class BluetoothTestAndroid : public BluetoothTestBase {
  public:
   BluetoothTestAndroid();
   ~BluetoothTestAndroid() override;
 
   // Test overrides:
   void SetUp() override;
   void TearDown() override;
 
@@ skipping 141 matching lines @@
   int gatt_open_connections_ = 0;
   BluetoothRemoteGattDescriptor* remembered_ccc_descriptor_ = nullptr;
 };
 
 // Defines common test fixture name. Use TEST_F(BluetoothTest, YourTestName).
 typedef BluetoothTestAndroid BluetoothTest;
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_TEST_BLUETOOTH_TEST_ANDROID_H_