bluetooth: Make device/bluetooth a shared library component.

device/bluetooth/bluetooth_adapter_win.h

Index: device/bluetooth/bluetooth_adapter_win.h
diff --git a/device/bluetooth/bluetooth_adapter_win.h b/device/bluetooth/bluetooth_adapter_win.h
index 6d62d2e8a237f11b53a3f02a25799f0a31274f6f..7d1912566458e28b4a777a9fc6c616cc8b11fc90 100644
--- a/device/bluetooth/bluetooth_adapter_win.h
+++ b/device/bluetooth/bluetooth_adapter_win.h
@@ -15,6 +15,7 @@
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "device/bluetooth/bluetooth_adapter.h"
+#include "device/bluetooth/bluetooth_export.h"
 #include "device/bluetooth/bluetooth_task_manager_win.h"
 
 namespace base {
@@ -28,8 +29,9 @@ class BluetoothAdapterWinTest;
 class BluetoothDevice;
 class BluetoothSocketThread;
 
-class BluetoothAdapterWin : public BluetoothAdapter,
-                            public BluetoothTaskManagerWin::Observer {
+class DEVICE_BLUETOOTH_EXPORT BluetoothAdapterWin
+    : public BluetoothAdapter,
+      public BluetoothTaskManagerWin::Observer {
  public:
   static base::WeakPtr<BluetoothAdapter> CreateAdapter(
       const InitCallback& init_callback);