Neuter file descriptor ownership enforcement.

This Linux-only feature isn't used by zucchini and adds dependencies on
dlsym and RAW_LOG.
---
 base/files/scoped_file_linux.cc | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/base/files/scoped_file_linux.cc b/base/files/scoped_file_linux.cc
index 61ee19f9c86d..b2adf99e55fd 100644
--- a/base/files/scoped_file_linux.cc
+++ b/base/files/scoped_file_linux.cc
@@ -4,6 +4,7 @@
 
 #include "base/files/scoped_file.h"
 
+#if !defined(MOZ_ZUCCHINI)
 #include <dlfcn.h>
 
 #include <algorithm>
@@ -47,22 +48,28 @@ void UpdateAndCheckFdOwnership(int fd, bool owned) {
 }
 
 }  // namespace
+#endif  // !defined(MOZ_ZUCCHINI)
 
 namespace base {
 namespace internal {
 
 // static
 void ScopedFDCloseTraits::Acquire(const ScopedFD& owner, int fd) {
+#if !defined(MOZ_ZUCCHINI)
   UpdateAndCheckFdOwnership(fd, /*owned=*/true);
+#endif  // !defined(MOZ_ZUCCHINI)
 }
 
 // static
 void ScopedFDCloseTraits::Release(const ScopedFD& owner, int fd) {
+#if !defined(MOZ_ZUCCHINI)
   UpdateAndCheckFdOwnership(fd, /*owned=*/false);
+#endif  // !defined(MOZ_ZUCCHINI)
 }
 
 }  // namespace internal
 
+#if !defined(MOZ_ZUCCHINI)
 namespace subtle {
 
 void EnableFDOwnershipEnforcement(bool enabled) {
@@ -78,9 +85,11 @@ void ResetFDOwnership() {
 bool IsFDOwned(int fd) {
   return CanTrack(fd) && g_is_fd_owned[static_cast<size_t>(fd)];
 }
+#endif  // !defined(MOZ_ZUCCHINI)
 
 }  // namespace base
 
+#if !defined(MOZ_ZUCCHINI)
 using LibcCloseFuncPtr = int (*)(int);
 
 // Load the libc close symbol to forward to from the close wrapper.
@@ -110,3 +119,4 @@ __attribute__((visibility("default"), noinline)) int close(int fd) {
 }
 
 }  // extern "C"
+#endif  // !defined(MOZ_ZUCCHINI)
-- 
2.42.0.windows.2