Add missing windows specific headers

https://bugs.freedesktop.org/show_bug.cgi?id=96754

webrtc/base/win32.h

+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+#ifndef WEBRTC_BASE_WIN32_H_
+#define WEBRTC_BASE_WIN32_H_
+#if defined(WEBRTC_WIN)
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+// Make sure we don't get min/max macros
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+#include <winsock2.h>
+#include <windows.h>
+#ifndef SECURITY_MANDATORY_LABEL_AUTHORITY
+// Add defines that we use if we are compiling against older sdks
+#define SECURITY_MANDATORY_MEDIUM_RID               (0x00002000L)
+#define TokenIntegrityLevel static_cast<TOKEN_INFORMATION_CLASS>(0x19)
+typedef struct _TOKEN_MANDATORY_LABEL {
+    SID_AND_ATTRIBUTES Label;
+} TOKEN_MANDATORY_LABEL, *PTOKEN_MANDATORY_LABEL;
+#endif  // SECURITY_MANDATORY_LABEL_AUTHORITY
+#undef SetPort
+#include <string>
+#include "webrtc/base/stringutils.h"
+#include "webrtc/base/basictypes.h"
+namespace rtc {
+const char* win32_inet_ntop(int af, const void *src, char* dst, socklen_t size);
+int win32_inet_pton(int af, const char* src, void *dst);
+inline std::wstring ToUtf16(const char* utf8, size_t len) {
+  int len16 = ::MultiByteToWideChar(CP_UTF8, 0, utf8, static_cast<int>(len),
+                                    NULL, 0);
+  wchar_t* ws = STACK_ARRAY(wchar_t, len16);
+  ::MultiByteToWideChar(CP_UTF8, 0, utf8, static_cast<int>(len), ws, len16);
+  return std::wstring(ws, len16);
+}
+inline std::wstring ToUtf16(const std::string& str) {
+  return ToUtf16(str.data(), str.length());
+}
+inline std::string ToUtf8(const wchar_t* wide, size_t len) {
+  int len8 = ::WideCharToMultiByte(CP_UTF8, 0, wide, static_cast<int>(len),
+                                   NULL, 0, NULL, NULL);
+  char* ns = STACK_ARRAY(char, len8);
+  ::WideCharToMultiByte(CP_UTF8, 0, wide, static_cast<int>(len), ns, len8,
+                        NULL, NULL);
+  return std::string(ns, len8);
+}
+inline std::string ToUtf8(const wchar_t* wide) {
+  return ToUtf8(wide, wcslen(wide));
+}
+inline std::string ToUtf8(const std::wstring& wstr) {
+  return ToUtf8(wstr.data(), wstr.length());
+}
+// Convert FILETIME to time_t
+void FileTimeToUnixTime(const FILETIME& ft, time_t* ut);
+// Convert time_t to FILETIME
+void UnixTimeToFileTime(const time_t& ut, FILETIME * ft);
+// Convert a Utf8 path representation to a non-length-limited Unicode pathname.
+bool Utf8ToWindowsFilename(const std::string& utf8, std::wstring* filename);
+// Convert a FILETIME to a UInt64
+inline uint64_t ToUInt64(const FILETIME& ft) {
+  ULARGE_INTEGER r = {{ft.dwLowDateTime, ft.dwHighDateTime}};
+  return r.QuadPart;
+}
+enum WindowsMajorVersions {
+  kWindows2000 = 5,
+  kWindowsVista = 6,
+};
+bool GetOsVersion(int* major, int* minor, int* build);
+inline bool IsWindowsVistaOrLater() {
+  int major;
+  return (GetOsVersion(&major, NULL, NULL) && major >= kWindowsVista);
+}
+inline bool IsWindowsXpOrLater() {
+  int major, minor;
+  return (GetOsVersion(&major, &minor, NULL) &&
+          (major >= kWindowsVista ||
+          (major == kWindows2000 && minor >= 1)));
+}
+inline bool IsWindows8OrLater() {
+  int major, minor;
+  return (GetOsVersion(&major, &minor, NULL) &&
+          (major > kWindowsVista ||
+          (major == kWindowsVista && minor >= 2)));
+}
+// Determine the current integrity level of the process.
+bool GetCurrentProcessIntegrityLevel(int* level);
+inline bool IsCurrentProcessLowIntegrity() {
+  int level;
+  return (GetCurrentProcessIntegrityLevel(&level) &&
+      level < SECURITY_MANDATORY_MEDIUM_RID);
+}
+bool AdjustCurrentProcessPrivilege(const TCHAR* privilege, bool to_enable);
+}  // namespace rtc
+#endif  // WEBRTC_WIN
+#endif  // WEBRTC_BASE_WIN32_H_