Reland: Add code to deal with serial device disconnection detection on Windows

device/core/device_info_query_win.cc

+// Copyright 2015 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/core/device_info_query_win.h"
+
+#include <string.h>
+
+#include "base/strings/string_util.h"
+
+namespace device {
+
+DeviceInfoQueryWin::DeviceInfoQueryWin()
+    : device_info_list_(SetupDiCreateDeviceInfoList(nullptr, nullptr)) {
+  memset(&device_info_data_, 0, sizeof(device_info_data_));
+}
+
+DeviceInfoQueryWin::~DeviceInfoQueryWin() {
+  if (device_info_list_valid()) {
+    // Release |device_info_data_| only when it is valid.
+    if (device_info_data_.cbSize != 0)
+      SetupDiDeleteDeviceInfo(device_info_list_, &device_info_data_);
+    SetupDiDestroyDeviceInfoList(device_info_list_);
+  }
+}
+
+bool DeviceInfoQueryWin::AddDevice(const char* device_path) {
+  return SetupDiOpenDeviceInterfaceA(device_info_list_, device_path, 0,
+                                     nullptr) != FALSE;
+}
+
+bool DeviceInfoQueryWin::GetDeviceInfo() {
+  DCHECK_EQ(0U, device_info_data_.cbSize);
+  device_info_data_.cbSize = sizeof(device_info_data_);
+  if (!SetupDiEnumDeviceInfo(device_info_list_, 0, &device_info_data_)) {
+    // Clear cbSize to maintain the invariant.
+    device_info_data_.cbSize = 0;
+    return false;
+  }
+  return true;
+}
+
+bool DeviceInfoQueryWin::GetDeviceStringProperty(DWORD property,
+                                                 std::string* property_buffer) {
+  DWORD property_reg_data_type;
+  const size_t property_buffer_length = 512;
+  if (!SetupDiGetDeviceRegistryPropertyA(
+          device_info_list_, &device_info_data_, property,
+          &property_reg_data_type,
+          reinterpret_cast<PBYTE>(
+              base::WriteInto(property_buffer, property_buffer_length)),
+          static_cast<DWORD>(property_buffer_length), nullptr))
+    return false;
+
+  if (property_reg_data_type != REG_SZ)
+    return false;
+
+  // Shrink |property_buffer| down to its correct size.
+  size_t eos = property_buffer->find('\0');
+  if (eos != std::string::npos)
+    property_buffer->resize(eos);
+
+  return true;
+}
+
+}  // namespace device