bluetooth: Make device/bluetooth a shared library component.

device/bluetooth/bluetooth_socket.h

Index: device/bluetooth/bluetooth_socket.h
diff --git a/device/bluetooth/bluetooth_socket.h b/device/bluetooth/bluetooth_socket.h
index 66d4480ecb76f877f320d3581a364b71f0a6ab48..395c7cb90249827e4ae474439c4c0ac30f205037 100644
--- a/device/bluetooth/bluetooth_socket.h
+++ b/device/bluetooth/bluetooth_socket.h
@@ -9,6 +9,7 @@
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
+#include "device/bluetooth/bluetooth_export.h"
 
 namespace net {
 class IOBuffer;
@@ -27,7 +28,8 @@ class BluetoothUUID;
 // various instance methods on the same thread as the thread used at
 // construction time -- platform specific implementation are responsible for
 // marshalling calls to a different thread if required.
-class BluetoothSocket : public base::RefCountedThreadSafe<BluetoothSocket> {
+class DEVICE_BLUETOOTH_EXPORT BluetoothSocket
+    : public base::RefCountedThreadSafe<BluetoothSocket> {
  public:
   enum ErrorReason { kSystemError, kIOPending, kDisconnected };