Revert "[webcrypto] Add decrypt() for AES-CBC."

content/renderer/webcrypto/webcrypto_impl_openssl.cc

Index: content/renderer/webcrypto/webcrypto_impl_openssl.cc
diff --git a/content/renderer/webcrypto/webcrypto_impl_openssl.cc b/content/renderer/webcrypto/webcrypto_impl_openssl.cc
index 040c174a62b0c85c6598158d9d8a61761e6eaf28..47b91eeb5e7cf913ae04d74bc8ce3b9b9d6e00e0 100644
--- a/content/renderer/webcrypto/webcrypto_impl_openssl.cc
+++ b/content/renderer/webcrypto/webcrypto_impl_openssl.cc
@@ -18,15 +18,6 @@ bool WebCryptoImpl::EncryptInternal(
   return false;
 }
 
-bool WebCryptoImpl::DecryptInternal(
-    const WebKit::WebCryptoAlgorithm& algorithm,
-    const WebKit::WebCryptoKey& key,
-    const unsigned char* data,
-    unsigned data_size,
-    WebKit::WebArrayBuffer* buffer) {
-  return false;
-}
-
 bool WebCryptoImpl::DigestInternal(
     const WebKit::WebCryptoAlgorithm& algorithm,
     const unsigned char* data,