Crypto: Add crypto_api to code needed outside of crypto

crypto/nss_util_internal.h

Index: crypto/nss_util_internal.h
===================================================================
--- crypto/nss_util_internal.h	(revision 89554)
+++ crypto/nss_util_internal.h	(working copy)
@@ -8,6 +8,8 @@
 
 #include <secmodt.h>
 
+#include "crypto/crypto_api.h"
+
 // These functions return a type defined in an NSS header, and so cannot be
 // declared in nss_util.h.  Hence, they are declared here.
 
@@ -23,7 +25,7 @@
 // key slot if on ChromeOS and EnableTPMForNSS() has been called
 // successfully. Caller must release returned reference with
 // PK11_FreeSlot.
-PK11SlotInfo* GetPrivateNSSKeySlot();
+CRYPTO_API PK11SlotInfo* GetPrivateNSSKeySlot();
 
 // A helper class that acquires the SECMOD list read lock while the
 // AutoSECMODListReadLock is in scope.