Implement //device/bt changes for notifications.

device/bluetooth/bluez/bluetooth_local_gatt_characteristic_bluez.cc

Index: device/bluetooth/bluez/bluetooth_local_gatt_characteristic_bluez.cc
diff --git a/device/bluetooth/bluez/bluetooth_local_gatt_characteristic_bluez.cc b/device/bluetooth/bluez/bluetooth_local_gatt_characteristic_bluez.cc
index c43f5c7e899c84cb06315ec65375a1df2027d769..343df50e2bb3a09d619df6893458babba6dd5486 100644
--- a/device/bluetooth/bluez/bluetooth_local_gatt_characteristic_bluez.cc
+++ b/device/bluetooth/bluez/bluetooth_local_gatt_characteristic_bluez.cc
@@ -8,6 +8,10 @@
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
+#include "dbus/object_path.h"
+#include "device/bluetooth/bluetooth_gatt_characteristic.h"
+#include "device/bluetooth/bluez/bluetooth_adapter_bluez.h"
+#include "device/bluetooth/bluez/bluetooth_gatt_service_bluez.h"
 #include "device/bluetooth/bluez/bluetooth_local_gatt_service_bluez.h"
 
 namespace device {
@@ -67,6 +71,20 @@ BluetoothLocalGattCharacteristicBlueZ::GetPermissions() const {
   return Permissions();
 }
 
+device::BluetoothLocalGattCharacteristic::NotificationStatus
+BluetoothLocalGattCharacteristicBlueZ::NotifyValueChanged(
+    const std::vector<uint8_t>& new_value,
+    bool indicate) {
+  if (indicate && !(properties_ & PROPERTY_INDICATE))
+    return INDICATE_PROPERTY_NOT_SET;
+  if (!indicate && !(properties_ & PROPERTY_NOTIFY))
+    return NOTIFY_PROPERTY_NOT_SET;
+  DCHECK(service_);
+  return service_->GetAdapter()->SendValueChanged(this, new_value)
+             ? NOTIFICATION_SUCCESS
+             : SERVICE_NOT_REGISTERED;
+}
+
 BluetoothLocalGattServiceBlueZ*
 BluetoothLocalGattCharacteristicBlueZ::GetService() {
   return service_;