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

crypto/symmetric_key_nss.cc

Index: crypto/symmetric_key_nss.cc
===================================================================
--- crypto/symmetric_key_nss.cc	(revision 79901)
+++ crypto/symmetric_key_nss.cc	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -10,7 +10,7 @@
 #include "base/nss_util.h"
 #include "base/logging.h"
 
-namespace base {
+namespace crypto {
 
 SymmetricKey::~SymmetricKey() {}
 
@@ -124,4 +124,4 @@
   DCHECK(key);
 }
 
-}  // namespace base
+}  // namespace crypto