bluetooth: Make device/bluetooth a shared library component.

device/bluetooth/bluetooth_gatt_descriptor.h

Index: device/bluetooth/bluetooth_gatt_descriptor.h
diff --git a/device/bluetooth/bluetooth_gatt_descriptor.h b/device/bluetooth/bluetooth_gatt_descriptor.h
index 4e2ee9ce1384dbc2bcb1880e6f4ccb09a1441fe4..442a6aeb2c8a4b5100ca153182402151eee38fd4 100644
--- a/device/bluetooth/bluetooth_gatt_descriptor.h
+++ b/device/bluetooth/bluetooth_gatt_descriptor.h
@@ -9,6 +9,7 @@
 
 #include "base/basictypes.h"
 #include "base/callback.h"
+#include "device/bluetooth/bluetooth_export.h"
 #include "device/bluetooth/bluetooth_gatt_characteristic.h"
 #include "device/bluetooth/bluetooth_uuid.h"
 
@@ -18,7 +19,7 @@ namespace device {
 // descriptor. A GATT characteristic descriptor provides further information
 // about a characteristic's value. They can be used to describe the
 // characteristic's features or to control certain behaviors.
-class BluetoothGattDescriptor {
+class DEVICE_BLUETOOTH_EXPORT BluetoothGattDescriptor {
  public:
   // The Bluetooth Specification declares several predefined descriptors that
   // profiles can use. The following are definitions for the list of UUIDs