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

crypto/symmetric_key_win.cc

Index: crypto/symmetric_key_win.cc
===================================================================
--- crypto/symmetric_key_win.cc	(revision 79901)
+++ crypto/symmetric_key_win.cc	(working copy)
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "base/crypto/symmetric_key.h"
+#include "crypto/symmetric_key.h"
 
 #include <winsock2.h>  // For htonl.
 
@@ -11,7 +11,7 @@
 // TODO(wtc): replace scoped_array by std::vector.
 #include "base/memory/scoped_ptr.h"
 
-namespace base {
+namespace crypto {
 
 namespace {
 
@@ -533,4 +533,4 @@
   }
 }
 
-}  // namespace base
+}  // namespace crypto