bluetooth: Make device/bluetooth a shared library component.

device/bluetooth/bluetooth_gatt_notify_session.h

 // Copyright 2014 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_GATT_NOTIFY_SESSION_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_GATT_NOTIFY_SESSION_H_
 
 #include <string>
 
 #include "base/callback.h"
+#include "device/bluetooth/bluetooth_export.h"
 
 namespace device {
 
 // A BluetoothGattNotifySession represents an active session for listening
 // to value updates from GATT characteristics that support notifications and/or
 // indications. Instances are obtained by calling
 // BluetoothGattCharacteristic::StartNotifySession.
-class BluetoothGattNotifySession {
+class DEVICE_BLUETOOTH_EXPORT BluetoothGattNotifySession {
  public:
   // Destructor automatically stops this session.
   virtual ~BluetoothGattNotifySession();
 
   // Returns the identifier of the associated characteristic.
   virtual std::string GetCharacteristicIdentifier() const = 0;
 
   // Returns true if this session is active.
   virtual bool IsActive() = 0;
 
   // Stops this session and calls |callback| upon completion. This won't
   // necessarily stop value updates from the characteristic -- since updates
   // are shared among BluetoothGattNotifySession instances -- but it will
   // terminate this session.
   virtual void Stop(const base::Closure& callback) = 0;
 
  protected:
   BluetoothGattNotifySession();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BluetoothGattNotifySession);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_GATT_NOTIFY_SESSION_H_