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

net/base/x509_certificate.h

Index: net/base/x509_certificate.h
===================================================================
--- net/base/x509_certificate.h	(revision 81350)
+++ net/base/x509_certificate.h	(working copy)
@@ -36,10 +36,10 @@
 
 class Pickle;
 
-namespace base {
+namespace crypto {
 class StringPiece;
 class RSAPrivateKey;
-}  // namespace base
+}  // namespace crypto
 
 namespace net {
 
@@ -176,7 +176,7 @@
   // 2. Self-signed certificates cannot be revoked.
   //
   // Use this certificate only after the above risks are acknowledged.
-  static X509Certificate* CreateSelfSigned(base::RSAPrivateKey* key,
+  static X509Certificate* CreateSelfSigned(crypto::RSAPrivateKey* key,
                                            const std::string& subject,
                                            uint32 serial_number,
                                            base::TimeDelta valid_duration);