Reland "Add Linux support for the Bluetooth API"

device/bluetooth/bluetooth_adapter_factory.h

 // Copyright (c) 2012 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_BLUETOOTH_ADAPTER_FACTORY_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_FACTORY_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "device/bluetooth/bluetooth_adapter.h"
@@ skipping 11 matching lines @@
   // Returns true if the Bluetooth adapter is available for the current
   // platform.
   static bool IsBluetoothAdapterAvailable();
 
   // Returns the shared instance of the default adapter, creating and
   // initializing it if necessary. |callback| is called with the adapter
   // instance passed only once the adapter is fully initialized and ready to
   // use.
   static void GetAdapter(const AdapterCallback& callback);
 
-#if defined(OS_CHROMEOS)
+#if defined(OS_CHROMEOS) || defined(OS_LINUX)
   // Calls |BluetoothAdapter::Shutdown| on the adapter if
   // present.
   static void Shutdown();
 #endif
 
   // Sets the shared instance of the default adapter for testing purposes only,
   // no reference is retained after completion of the call, removing the last
   // reference will reset the factory.
   static void SetAdapterForTesting(scoped_refptr<BluetoothAdapter> adapter);
 
   // Returns true iff the implementation has a (non-NULL) shared instance of the
   // adapter. Exposed for testing.
   static bool HasSharedInstanceForTesting();
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_FACTORY_H_