Revert of Refactoring of Cast-related crypto code

chrome/common/extensions/api/networking_private/networking_private_crypto.h

Index: chrome/common/extensions/api/networking_private/networking_private_crypto.h
diff --git a/chrome/common/extensions/api/networking_private/networking_private_crypto.h b/chrome/common/extensions/api/networking_private/networking_private_crypto.h
index 8940c0ba066bf108106e2c44bbbd8fc7bba690e1..e61329387165293ce3ceacd706dd90a324320084 100644
--- a/chrome/common/extensions/api/networking_private/networking_private_crypto.h
+++ b/chrome/common/extensions/api/networking_private/networking_private_crypto.h
@@ -20,12 +20,10 @@
 // 2) The certificate is a valid PEM encoded certificate signed by trusted CA.
 // 3) |signature| is a valid signature for |data|, using the public key in
 // |certificate|
-bool VerifyCredentials(
-    const std::string& certificate,
-    const std::vector<std::string>& intermediate_certificates,
-    const std::string& signature,
-    const std::string& data,
-    const std::string& connected_mac);
+bool VerifyCredentials(const std::string& certificate,
+                       const std::string& signature,
+                       const std::string& data,
+                       const std::string& connected_mac);
 
 // Encrypt |data| with |public_key|. |public_key| is a DER-encoded
 // RSAPublicKey. |data| is some string of bytes that is smaller than the
@@ -46,6 +44,12 @@
                        const std::vector<uint8_t>& encrypted_data,
                        std::string* decrypted_output);
 
+// The trusted public key as a DER-encoded PKCS#1 RSAPublicKey structure.
+extern const uint8_t kTrustedCAPublicKeyDER[];
+
+// The length of |kTrustedCAPublicKeyDER| in bytes.
+extern const size_t kTrustedCAPublicKeyDERLength;
+
 }  // namespace networking_private_crypto
 
 #endif  // CHROME_COMMON_EXTENSIONS_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_CRYPTO_H_