bluetooth: Refactor GetDescriptorForUUID to GetDescriptorsForUUID.

device/bluetooth/bluetooth_gatt_characteristic.cc

Index: device/bluetooth/bluetooth_gatt_characteristic.cc
diff --git a/device/bluetooth/bluetooth_gatt_characteristic.cc b/device/bluetooth/bluetooth_gatt_characteristic.cc
index 66c39f68ebaf1987c54b1b8ba6e7d940db997683..a5f48dea1638081a0ac82d260309cd57866ff626 100644
--- a/device/bluetooth/bluetooth_gatt_characteristic.cc
+++ b/device/bluetooth/bluetooth_gatt_characteristic.cc
@@ -25,14 +25,15 @@ BluetoothGattCharacteristic* BluetoothGattCharacteristic::Create(
   return NULL;
 }
 
-BluetoothGattDescriptor* BluetoothGattCharacteristic::GetDescriptorForUUID(
-    const BluetoothUUID& uuid) {
+std::vector<BluetoothGattDescriptor*>
+BluetoothGattCharacteristic::GetDescriptorsForUUID(const BluetoothUUID& uuid) {
+  std::vector<BluetoothGattDescriptor*> descriptors;
   for (BluetoothGattDescriptor* descriptor : GetDescriptors()) {
     if (descriptor->GetUUID() == uuid) {
-      return descriptor;
+      descriptors.push_back(descriptor);
     }
   }
-  return NULL;
+  return descriptors;
 }
 
 }  // namespace device