clang/win: Fix build after https://codereview.chromium.org/1496093002

chrome/installer/mini_installer/mini_installer.cc

Index: chrome/installer/mini_installer/mini_installer.cc
diff --git a/chrome/installer/mini_installer/mini_installer.cc b/chrome/installer/mini_installer/mini_installer.cc
index 06a3a84c333f6b2d00eb731f3f312ba59927c151..5f42ae9ae2358ed2a6ae6f9a9fa08828f9231e9b 100644
--- a/chrome/installer/mini_installer/mini_installer.cc
+++ b/chrome/installer/mini_installer/mini_installer.cc
@@ -566,13 +566,13 @@ bool GetCurrentOwnerSid(wchar_t** sid) {
     return false;
 
   DWORD size = 0;
-  TOKEN_OWNER* owner = NULL;
   bool result = false;
   // We get the TokenOwner rather than the TokenUser because e.g. under UAC
   // elevation we want the admin to own the directory rather than the user.
-  ::GetTokenInformation(token, TokenOwner, &owner, 0, &size);
+  ::GetTokenInformation(token, TokenOwner, NULL, 0, &size);
   if (size && GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
-    if (owner = reinterpret_cast<TOKEN_OWNER*>(::LocalAlloc(LPTR, size))) {
+    if (TOKEN_OWNER* owner =
+            reinterpret_cast<TOKEN_OWNER*>(::LocalAlloc(LPTR, size))) {
       if (::GetTokenInformation(token, TokenOwner, owner, size, &size))
         result = ::ConvertSidToStringSid(owner->Owner, sid);
       ::LocalFree(owner);