Fix some clang warnings with -Wmissing-braces in WebRTC.

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.
  */
 
@@ skipping 68 matching lines @@
 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 ToUInt64(const FILETIME& ft) {
-  ULARGE_INTEGER r = {ft.dwLowDateTime, ft.dwHighDateTime};
+  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() {
@@ skipping 23 matching lines @@
   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_