[webcrypto] Reject failed operations with a DOMException rather than null.

Source/platform/exported/WebCryptoResult.cpp

Index: Source/platform/exported/WebCryptoResult.cpp
diff --git a/Source/platform/exported/WebCryptoResult.cpp b/Source/platform/exported/WebCryptoResult.cpp
index b2aa5980da5227d1a1c620f115d935fe277eb0f2..dff47af58fc90724f1b25491ccbbf336697c6131 100644
--- a/Source/platform/exported/WebCryptoResult.cpp
+++ b/Source/platform/exported/WebCryptoResult.cpp
@@ -38,15 +38,9 @@
 
 namespace blink {
 
-void WebCryptoResult::completeWithError()
+void WebCryptoResult::completeWithError(WebCryptoErrorType errorType, const WebString& errorDetails)
 {
-    m_impl->completeWithError();
-    reset();
-}
-
-void WebCryptoResult::completeWithError(const WebString& errorDetails)
-{
-    m_impl->completeWithError(errorDetails);
+    m_impl->completeWithError(errorType, errorDetails);
     reset();
 }