bluetooth: Add DeviceChanged logging in Device service.

device/bluetooth/device.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 <utility>
 
 #include "base/strings/utf_string_conversions.h"
 #include "device/bluetooth/device.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 
 namespace bluetooth {
 
 Device::Device(const std::string& address,
                scoped_refptr<device::BluetoothAdapter> adapter)
-    : address_(address), adapter_(std::move(adapter)) {}
+    : address_(address), adapter_(std::move(adapter)) {
+  adapter_->AddObserver(this);
+}
 
-Device::~Device() {}
+Device::~Device() {
+  adapter_->RemoveObserver(this);
+  adapter_ = nullptr;
+}
 
 // static
 mojom::DeviceInfoPtr Device::ConstructDeviceInfoStruct(
     const device::BluetoothDevice* device) {
   mojom::DeviceInfoPtr device_info = mojom::DeviceInfo::New();
 
   device_info->name = device->GetName();
   device_info->name_for_display =
       base::UTF16ToUTF8(device->GetNameForDisplay());
   device_info->address = device->GetAddress();
 
   return device_info;
 }
 
+void Device::DeviceChanged(device::BluetoothAdapter* adapter,
+                           device::BluetoothDevice* device) {
+  if (client_ && device->GetAddress() == address_) {
+    mojom::AdvertisingPacketPtr packet = mojom::AdvertisingPacket::New();
+    packet->timestamp = base::Time::Now().ToJavaTime();
+    packet->rssi = device->GetInquiryRSSI().value_or(0);
+    packet->device = ConstructDeviceInfoStruct(device);
+    client_->DeviceChanged(std::move(packet));
+  }
+}
+
 void Device::GetInfo(const GetInfoCallback& callback) {
   device::BluetoothDevice* device = adapter_->GetDevice(address_);
   if (device) {
     mojom::DeviceInfoPtr device_info = ConstructDeviceInfoStruct(device);
     callback.Run(std::move(device_info));
   } else {
     callback.Run(nullptr);
   }
 }
 
+void Device::SetClient(mojom::GattClientPtr client) {
+  client_ = std::move(client);
+}
+
 }  // namespace bluetooth