Fix compile error for gn build of mini_installer

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 f3d7260dd40a03f4d2b8777238a181921e820f4d..8b7794f5eb0febc8f0e864d5d4ac22fd79ca8676 100644
--- a/chrome/installer/mini_installer/mini_installer.cc
+++ b/chrome/installer/mini_installer/mini_installer.cc
@@ -526,9 +526,11 @@ void DeleteExtractedFiles(const wchar_t* base_path,
 bool IsAclSupportedForPath(const wchar_t* path) {
   PathString volume;
   DWORD flags = 0;
-  return ::GetVolumePathName(path, volume.get(), volume.capacity()) &&
-             ::GetVolumeInformation(volume.get(), NULL, 0, NULL, NULL, &flags,
-                                    NULL, 0) && (flags & FILE_PERSISTENT_ACLS);
+  return ::GetVolumePathName(path, volume.get(),
+                             static_cast<DWORD>(volume.capacity())) &&

[grt (UTC plus 2), 2016/02/03 14:54:11]

ah, the size_t -> DWORD conversion was the problem? makes sense.

[gab, 2016/02/03 16:21:45]

Right, sorry forgot to add that to description (and now down 11000 targets to
rebuild before I can repro error because I was playing with my repo..)

+         ::GetVolumeInformation(volume.get(), nullptr, 0, nullptr, nullptr,

[grt (UTC plus 2), 2016/02/03 14:54:11]

we have to stick with C++-03 for a little longer in mini_installer. please
revert to using NULL rather than nullptr.

[gab, 2016/02/03 16:21:45]

Done.

+                                &flags, nullptr, 0) &&
+         (flags & FILE_PERSISTENT_ACLS);
 }
 
 // Retrieves the SID of the default owner for objects created by this user