bluetooth: Make device/bluetooth a shared library component.

device/bluetooth/bluetooth_adapter_mac.h

Index: device/bluetooth/bluetooth_adapter_mac.h
diff --git a/device/bluetooth/bluetooth_adapter_mac.h b/device/bluetooth/bluetooth_adapter_mac.h
index 38002eb08f00b55fe632d6d94cf3b7e0398df1a9..a20bea7c912bbe647f15df843cc349222995acff 100644
--- a/device/bluetooth/bluetooth_adapter_mac.h
+++ b/device/bluetooth/bluetooth_adapter_mac.h
@@ -17,6 +17,7 @@
 #include "base/observer_list.h"
 #include "device/bluetooth/bluetooth_adapter.h"
 #include "device/bluetooth/bluetooth_discovery_manager_mac.h"
+#include "device/bluetooth/bluetooth_export.h"
 
 @class IOBluetoothDevice;
 @class NSArray;
@@ -32,8 +33,9 @@ namespace device {
 
 class BluetoothAdapterMacTest;
 
-class BluetoothAdapterMac : public BluetoothAdapter,
-                            public BluetoothDiscoveryManagerMac::Observer {
+class DEVICE_BLUETOOTH_EXPORT BluetoothAdapterMac
+    : public BluetoothAdapter,
+      public BluetoothDiscoveryManagerMac::Observer {
  public:
   static base::WeakPtr<BluetoothAdapter> CreateAdapter();