Fix non-noise cpplint errors in //crypto.

crypto/mock_apple_keychain.h

Index: crypto/mock_apple_keychain.h
diff --git a/crypto/mock_apple_keychain.h b/crypto/mock_apple_keychain.h
index db4fcd8e043845470004de0750bc1dca86d9414f..38e69f2d9d4b5c252f83c79e11299e97c8b66913 100644
--- a/crypto/mock_apple_keychain.h
+++ b/crypto/mock_apple_keychain.h
@@ -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 CRYPTO_MOCK_KEYCHAIN_MAC_H_
-#define CRYPTO_MOCK_KEYCHAIN_MAC_H_
+#ifndef CRYPTO_MOCK_APPLE_KEYCHAIN_H_
+#define CRYPTO_MOCK_APPLE_KEYCHAIN_H_
 
 #include <stddef.h>
 #include <stdint.h>
@@ -254,4 +254,4 @@ class CRYPTO_EXPORT MockAppleKeychain : public AppleKeychain {
 
 }  // namespace crypto
 
-#endif  // CRYPTO_MOCK_KEYCHAIN_MAC_H_
+#endif  // CRYPTO_MOCK_APPLE_KEYCHAIN_H_