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

crypto/signature_verifier.h

Index: crypto/signature_verifier.h
===================================================================
--- crypto/signature_verifier.h	(revision 79901)
+++ crypto/signature_verifier.h	(working copy)
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef BASE_CRYPTO_SIGNATURE_VERIFIER_H_
-#define BASE_CRYPTO_SIGNATURE_VERIFIER_H_
+#ifndef CRYPTO_SIGNATURE_VERIFIER_H_
+#define CRYPTO_SIGNATURE_VERIFIER_H_
 #pragma once
 
 #include "build/build_config.h"
@@ -16,18 +16,17 @@
 
 #include <vector>
 
-#include "base/base_api.h"
 #include "base/basictypes.h"
 
 #if defined(OS_WIN)
-#include "base/crypto/scoped_capi_types.h"
+#include "crypto/scoped_capi_types.h"
 #endif
 
-namespace base {
+namespace crypto {
 
 // The SignatureVerifier class verifies a signature using a bare public key
 // (as opposed to a certificate).
-class BASE_API SignatureVerifier {
+class SignatureVerifier {
  public:
   SignatureVerifier();
   ~SignatureVerifier();
@@ -104,6 +103,6 @@
 #endif
 };
 
-}  // namespace base
+}  // namespace crypto
 
-#endif  // BASE_CRYPTO_SIGNATURE_VERIFIER_H_
+#endif  // CRYPTO_SIGNATURE_VERIFIER_H_