bluetooth: Add EXPORT macro to BluetoothAdapter::Observer.

device/bluetooth/bluetooth_adapter.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_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_H_
 
 #include <list>
 #include <map>
 #include <set>
@@ skipping 23 matching lines @@
 // BluetoothAdapter represents a local Bluetooth adapter which may be used to
 // interact with remote Bluetooth devices. As well as providing support for
 // determining whether an adapter is present and whether the radio is powered,
 // this class also provides support for obtaining the list of remote devices
 // known to the adapter, discovering new devices, and providing notification of
 // updates to device information.
 class DEVICE_BLUETOOTH_EXPORT BluetoothAdapter
     : public base::RefCounted<BluetoothAdapter> {
  public:
   // Interface for observing changes from bluetooth adapters.
-  class Observer {
+  class DEVICE_BLUETOOTH_EXPORT Observer {
    public:
     virtual ~Observer() {}
 
     // Called when the presence of the adapter |adapter| changes. When |present|
     // is true the adapter is now present, false means the adapter has been
     // removed from the system.
     virtual void AdapterPresentChanged(BluetoothAdapter* adapter,
                                        bool present) {}
 
     // Called when the radio power state of the adapter |adapter| changes. When
@@ skipping 433 matching lines @@
   std::set<BluetoothDiscoverySession*> discovery_sessions_;
 
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<BluetoothAdapter> weak_ptr_factory_;
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_H_