Implement WebBluetooth getDescriptor[s]

device/bluetooth/bluetooth_device.cc

 // Copyright (c) 2012 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.h"
 
 #include <iterator>
 #include <memory>
 #include <string>
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "device/bluetooth/bluetooth_adapter.h"
 #include "device/bluetooth/bluetooth_gatt_connection.h"
 #include "device/bluetooth/bluetooth_remote_gatt_characteristic.h"
+#include "device/bluetooth/bluetooth_remote_gatt_descriptor.h"
 #include "device/bluetooth/bluetooth_remote_gatt_service.h"
 #include "device/bluetooth/string_util_icu.h"
 #include "grit/bluetooth_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace device {
 
 BluetoothDevice::DeviceUUIDs::DeviceUUIDs() = default;
 
 BluetoothDevice::DeviceUUIDs::~DeviceUUIDs() = default;
@@ skipping 460 matching lines @@
       VLOG(2) << "Characteristic in cache: "
               << characteristic->GetUUID().canonical_value();
       if (characteristic->GetUUID() == characteristic_uuid) {
         characteristics.push_back(characteristic);
       }
     }
   }
   return characteristics;
 }
 
+std::vector<device::BluetoothRemoteGattDescriptor*>
+BluetoothDevice::GetDescriptorsByUUID(
+    device::BluetoothRemoteGattCharacteristic* characteristic,
+    const BluetoothUUID& descriptor_uuid) {
+  std::vector<device::BluetoothRemoteGattDescriptor*> descriptors;
+  DVLOG(1) << "Looking for descriptor: " << descriptor_uuid.canonical_value();
+  for (auto* descriptor : characteristic->GetDescriptors()) {
+    DVLOG(1) << "Descriptor in cache: "
+             << descriptor->GetUUID().canonical_value();
+    if (descriptor->GetUUID() == descriptor_uuid) {
+      descriptors.push_back(descriptor);
+    }
+  }
+  return descriptors;
+}
+
 void BluetoothDevice::DidConnectGatt() {
   for (const auto& callback : create_gatt_connection_success_callbacks_) {
     callback.Run(
         base::MakeUnique<BluetoothGattConnection>(adapter_, GetAddress()));
   }
   create_gatt_connection_success_callbacks_.clear();
   create_gatt_connection_error_callbacks_.clear();
   GetAdapter()->NotifyDeviceChanged(this);
 }
 
@@ skipping 59 matching lines @@
   if (power < INT8_MIN) {
     return INT8_MIN;
   }
   if (power > INT8_MAX) {
     return INT8_MAX;
   }
   return static_cast<int8_t>(power);
 }
 
 }  // namespace device