don't override libc code in a glibc-specific way when not using glibc

sandbox/linux/services/libc_urandom_override.cc

Index: sandbox/linux/services/libc_urandom_override.cc
diff --git a/sandbox/linux/services/libc_urandom_override.cc b/sandbox/linux/services/libc_urandom_override.cc
index dfb4c269e3ffd10a14f425ceae1580474767372d..67b6b1b617bfb68e7d9349ba8d88497008e065c4 100644
--- a/sandbox/linux/services/libc_urandom_override.cc
+++ b/sandbox/linux/services/libc_urandom_override.cc
@@ -59,6 +59,7 @@ static void InitLibcFileIOFunctions() {
     g_libc_fopen64 = g_libc_fopen;
   }
 
+#if defined(LIBC_GLIBC)
   // TODO(sergeyu): This works only on systems with glibc. Fix it to
   // work properly on other systems if necessary.
   g_libc_xstat = reinterpret_cast<XstatFunction>(
@@ -155,6 +156,7 @@ int xstat64_override(int version, const char *path, struct stat64 *buf) {
     return g_libc_xstat64(version, path, buf);
   }
 }
+#endif  // LIBC_GLIBC

[jln (very slow on Chromium), 2013/06/12 20:27:59]

Nit: this should be "// defined(LIBC_GLIBC)"

[Mostyn Bramley-Moore, 2013/06/12 20:41:41]

That doesn't match the format used two lines down, which has:
// !ADDRESS_SANITIZER

Would you prefer me to change both, or leave both?

 
 #endif  // !ADDRESS_SANITIZER