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

device/bluetooth/bluetooth_device_mac.mm

 // 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.
 
 #include "device/bluetooth/bluetooth_device_mac.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 45 matching lines @@
 
 }  // namespace
 
 BluetoothDeviceMac::BluetoothDeviceMac(IOBluetoothDevice* device)
     : device_([device retain]) {
 }
 
 BluetoothDeviceMac::~BluetoothDeviceMac() {
 }
 
-void BluetoothDeviceMac::AddObserver(
-    device::BluetoothDevice::Observer* observer) {
-  DCHECK(observer);
-  observers_.AddObserver(observer);
-}
-
-void BluetoothDeviceMac::RemoveObserver(
-    device::BluetoothDevice::Observer* observer) {
-  DCHECK(observer);
-  observers_.RemoveObserver(observer);
-}
-
 uint32 BluetoothDeviceMac::GetBluetoothClass() const {
   return [device_ classOfDevice];
 }
 
 std::string BluetoothDeviceMac::GetDeviceName() const {
   return base::SysNSStringToUTF8([device_ name]);
 }
 
 std::string BluetoothDeviceMac::GetAddress() const {
   return GetDeviceAddress(device_);
@@ skipping 169 matching lines @@
 
   return power_level;
 }
 
 // static
 std::string BluetoothDeviceMac::GetDeviceAddress(IOBluetoothDevice* device) {
   return CanonicalizeAddress(base::SysNSStringToUTF8([device addressString]));
 }
 
 }  // namespace device