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

content/renderer/webcrypto/webcrypto_impl.cc

Index: content/renderer/webcrypto/webcrypto_impl.cc
diff --git a/content/renderer/webcrypto/webcrypto_impl.cc b/content/renderer/webcrypto/webcrypto_impl.cc
index 6eeb3daf5a0cb07de9dc19128ed3e2913338054b..32c0433597e706172482cd8ff56acb9cc4a68739 100644
--- a/content/renderer/webcrypto/webcrypto_impl.cc
+++ b/content/renderer/webcrypto/webcrypto_impl.cc
@@ -29,20 +29,6 @@ void WebCryptoImpl::encrypt(
   }
 }
 
-void WebCryptoImpl::decrypt(
-    const WebKit::WebCryptoAlgorithm& algorithm,
-    const WebKit::WebCryptoKey& key,
-    const unsigned char* data,
-    unsigned data_size,
-    WebKit::WebCryptoResult result) {
-  WebKit::WebArrayBuffer buffer;
-  if (!DecryptInternal(algorithm, key, data, data_size, &buffer)) {
-    result.completeWithError();
-  } else {
-    result.completeWithBuffer(buffer);
-  }
-}
-
 void WebCryptoImpl::digest(
     const WebKit::WebCryptoAlgorithm& algorithm,
     const unsigned char* data,