cryptohome: Move Encrypt/DecryptWithSystemSalt() out of CryptohomeLibrary

chromeos/cryptohome/mock_cryptohome_library.h

Index: chromeos/cryptohome/mock_cryptohome_library.h
diff --git a/chromeos/cryptohome/mock_cryptohome_library.h b/chromeos/cryptohome/mock_cryptohome_library.h
index 5a08ac0a9a5e1ab02d1bfd25fb4c28b11ede9c21..7547d681c60fd5f1734aae72e97cf302e4c20ae9 100644
--- a/chromeos/cryptohome/mock_cryptohome_library.h
+++ b/chromeos/cryptohome/mock_cryptohome_library.h
@@ -23,9 +23,6 @@ class MockCryptohomeLibrary : public CryptohomeLibrary {
   virtual ~MockCryptohomeLibrary();
   MOCK_METHOD0(GetSystemSalt, std::string(void));
 
-  MOCK_METHOD1(EncryptWithSystemSalt, std::string(const std::string&));
-  MOCK_METHOD1(DecryptWithSystemSalt, std::string(const std::string&));
-
  private:
   DISALLOW_COPY_AND_ASSIGN(MockCryptohomeLibrary);
 };