Invoke GattDiscoveryCompleteForService by observing ServicesResolved property

device/bluetooth/bluez/bluetooth_remote_gatt_service_bluez.cc

 // Copyright 2016 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 <iterator>
 
 #include "base/logging.h"
 #include "dbus/property.h"
 #include "device/bluetooth/bluez/bluetooth_adapter_bluez.h"
 #include "device/bluetooth/bluez/bluetooth_device_bluez.h"
 #include "device/bluetooth/bluez/bluetooth_gatt_characteristic_bluez.h"
 #include "device/bluetooth/bluez/bluetooth_remote_gatt_characteristic_bluez.h"
 #include "device/bluetooth/bluez/bluetooth_remote_gatt_descriptor_bluez.h"
 #include "device/bluetooth/bluez/bluetooth_remote_gatt_service_bluez.h"
 #include "device/bluetooth/dbus/bluez_dbus_manager.h"
 
 namespace bluez {
 
 BluetoothRemoteGattServiceBlueZ::BluetoothRemoteGattServiceBlueZ(
     BluetoothAdapterBlueZ* adapter,
     BluetoothDeviceBlueZ* device,
     const dbus::ObjectPath& object_path)
     : BluetoothGattServiceBlueZ(adapter, object_path),
       device_(device),
-      discovery_complete_(false),
       weak_ptr_factory_(this) {
   VLOG(1) << "Creating remote GATT service with identifier: "
           << object_path.value();
   DCHECK(GetAdapter());
 
   bluez::BluezDBusManager::Get()->GetBluetoothGattServiceClient()->AddObserver(
       this);
   bluez::BluezDBusManager::Get()
       ->GetBluetoothGattCharacteristicClient()
       ->AddObserver(this);
@@ skipping 75 matching lines @@
       characteristics_.find(dbus::ObjectPath(identifier));
   if (iter == characteristics_.end())
     return nullptr;
   return iter->second;
 }
 
 void BluetoothRemoteGattServiceBlueZ::NotifyServiceChanged() {
   // Don't send service changed unless we know that all characteristics have
   // already been discovered. This is to prevent spammy events before sending
   // out the first Gatt
-  if (!discovery_complete_)
+  if (!device_->IsGattServicesDiscoveryComplete())
     return;
 
   DCHECK(GetAdapter());
   GetAdapter()->NotifyGattServiceChanged(this);
 }
 
 void BluetoothRemoteGattServiceBlueZ::NotifyDescriptorAddedOrRemoved(
     BluetoothRemoteGattCharacteristicBlueZ* characteristic,
     BluetoothRemoteGattDescriptorBlueZ* descriptor,
     bool added) {
@@ skipping 111 matching lines @@
   DCHECK(GetAdapter());
 
   if (property_name == properties->flags.name())
     NotifyServiceChanged();
   else if (property_name == properties->value.name())
     GetAdapter()->NotifyGattCharacteristicValueChanged(
         iter->second, properties->value.value());
 }
 
 }  // namespace bluez