Revert 114499 - Simplify PRTimeToBaseTime implementation, add BaseTimeToPRTime.

crypto/nss_util.h

Index: crypto/nss_util.h
===================================================================
--- crypto/nss_util.h	(revision 114522)
+++ crypto/nss_util.h	(working copy)
@@ -149,10 +149,6 @@
 // We use a int64 instead of PRTime here to avoid depending on NSPR headers.
 CRYPTO_EXPORT base::Time PRTimeToBaseTime(int64 prtime);
 
-// Convert a base::Time object into a PRTime value.
-// We use a int64 instead of PRTime here to avoid depending on NSPR headers.
-CRYPTO_EXPORT int64 BaseTimeToPRTime(base::Time time);
-
 #if defined(USE_NSS)
 // Exposed for unittests only.  |path| should be an existing directory under
 // which the DB files will be placed.  |description| is a user-visible name for