Move crypto files out of base, to a top level directory.

crypto/encryptor_mac.cc

Index: crypto/encryptor_mac.cc
===================================================================
--- crypto/encryptor_mac.cc	(revision 79901)
+++ crypto/encryptor_mac.cc	(working copy)
@@ -2,15 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "base/crypto/encryptor.h"
+#include "crypto/encryptor.h"
 
 #include <CommonCrypto/CommonCryptor.h>
 
-#include "base/crypto/symmetric_key.h"
 #include "base/logging.h"
 #include "base/string_util.h"
+#include "crypto/symmetric_key.h"
 
-namespace base {
+namespace crypto {
 
 Encryptor::Encryptor()
     : key_(NULL),
@@ -73,4 +73,4 @@
   return Crypt(kCCDecrypt, ciphertext, plaintext);
 }
 
-}  // namespace base
+}  // namespace crypto