device/bluetooth: Move GATT observer methods to BluetoothAdapter::Observer.

device/bluetooth/bluetooth_device_mac.h

 // Copyright 2013 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_DEVICE_MAC_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_DEVICE_MAC_H_
 
 #import <IOBluetooth/IOBluetooth.h>
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/observer_list.h"
 #include "device/bluetooth/bluetooth_device.h"
 
 @class IOBluetoothDevice;
 
 namespace device {
 
 class BluetoothDeviceMac : public BluetoothDevice {
  public:
   explicit BluetoothDeviceMac(IOBluetoothDevice* device);
   virtual ~BluetoothDeviceMac();
 
   // BluetoothDevice override
-  virtual void AddObserver(
-      device::BluetoothDevice::Observer* observer) OVERRIDE;
-  virtual void RemoveObserver(
-      device::BluetoothDevice::Observer* observer) OVERRIDE;
   virtual uint32 GetBluetoothClass() const OVERRIDE;
   virtual std::string GetAddress() const OVERRIDE;
   virtual VendorIDSource GetVendorIDSource() const OVERRIDE;
   virtual uint16 GetVendorID() const OVERRIDE;
   virtual uint16 GetProductID() const OVERRIDE;
   virtual uint16 GetDeviceID() const OVERRIDE;
   virtual int GetRSSI() const OVERRIDE;
   virtual int GetCurrentHostTransmitPower() const OVERRIDE;
   virtual int GetMaximumHostTransmitPower() const OVERRIDE;
   virtual bool IsPaired() const OVERRIDE;
@@ skipping 41 matching lines @@
   virtual std::string GetDeviceName() const OVERRIDE;
 
  private:
   friend class BluetoothAdapterMac;
 
   // Implementation to read the host's transmit power level of type
   // |power_level_type|.
   int GetHostTransmitPower(
       BluetoothHCITransmitPowerLevelType power_level_type) const;
 
-  // List of observers interested in event notifications from us.
-  ObserverList<Observer> observers_;
-
   base::scoped_nsobject<IOBluetoothDevice> device_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothDeviceMac);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_DEVICE_MAC_H_