device/bluetooth: Improvements to GATT descriptor access API.

device/bluetooth/bluetooth_remote_gatt_service_chromeos.cc

Index: device/bluetooth/bluetooth_remote_gatt_service_chromeos.cc
diff --git a/device/bluetooth/bluetooth_remote_gatt_service_chromeos.cc b/device/bluetooth/bluetooth_remote_gatt_service_chromeos.cc
index c2a5dbf87244b0e7df226e5d35bcb76a3b2cb479..f2ec8618a5c29a30c75b1fa3a9324bc3e7a04dab 100644
--- a/device/bluetooth/bluetooth_remote_gatt_service_chromeos.cc
+++ b/device/bluetooth/bluetooth_remote_gatt_service_chromeos.cc
@@ -10,6 +10,7 @@
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "device/bluetooth/bluetooth_device_chromeos.h"
 #include "device/bluetooth/bluetooth_remote_gatt_characteristic_chromeos.h"
+#include "device/bluetooth/bluetooth_remote_gatt_descriptor_chromeos.h"
 
 namespace chromeos {
 
@@ -164,6 +165,32 @@ void BluetoothRemoteGattServiceChromeOS::NotifyServiceChanged() {
                     GattServiceChanged(this));
 }
 
+void BluetoothRemoteGattServiceChromeOS::NotifyDescriptorAddedOrRemoved(
+    BluetoothRemoteGattCharacteristicChromeOS* characteristic,
+    BluetoothRemoteGattDescriptorChromeOS* descriptor,
+    bool added) {
+  DCHECK(characteristic->GetService() == this);
+  DCHECK(descriptor->GetCharacteristic() == characteristic);
+  if (added) {
+    FOR_EACH_OBSERVER(device::BluetoothGattService::Observer, observers_,
+                      GattDescriptorAdded(characteristic, descriptor));
+    return;
+  }
+  FOR_EACH_OBSERVER(device::BluetoothGattService::Observer, observers_,
+                    GattDescriptorRemoved(characteristic, descriptor));
+}
+
+void BluetoothRemoteGattServiceChromeOS::NotifyDescriptorValueChanged(
+    BluetoothRemoteGattCharacteristicChromeOS* characteristic,
+    BluetoothRemoteGattDescriptorChromeOS* descriptor,
+    const std::vector<uint8>& value) {
+  DCHECK(characteristic->GetService() == this);
+  DCHECK(descriptor->GetCharacteristic() == characteristic);
+  FOR_EACH_OBSERVER(
+      device::BluetoothGattService::Observer, observers_,
+      GattDescriptorValueChanged(characteristic, descriptor, value));
+}
+
 void BluetoothRemoteGattServiceChromeOS::GattServicePropertyChanged(
     const dbus::ObjectPath& object_path,
     const std::string& property_name){