webcrypto: Add ECDSA algorithm (chromium-side)

content/child/webcrypto/webcrypto_util.cc

Index: content/child/webcrypto/webcrypto_util.cc
diff --git a/content/child/webcrypto/webcrypto_util.cc b/content/child/webcrypto/webcrypto_util.cc
index bb4cbb9a4d0526312d2a7bb4ae8fd66bb0ab82f2..5e219dda4162d6b624365173ddf5b0a76e7ae0bc 100644
--- a/content/child/webcrypto/webcrypto_util.cc
+++ b/content/child/webcrypto/webcrypto_util.cc
@@ -137,6 +137,13 @@ blink::WebCryptoAlgorithm CreateRsaHashedImportAlgorithm(
       id, new blink::WebCryptoRsaHashedImportParams(CreateAlgorithm(hash_id)));
 }
 
+blink::WebCryptoAlgorithm CreateEcImportAlgorithm(
+    blink::WebCryptoAlgorithmId id,
+    blink::WebCryptoNamedCurve named_curve) {
+  return blink::WebCryptoAlgorithm::adoptParamsAndCreate(
+      id, new blink::WebCryptoEcKeyImportParams(named_curve));
+}
+
 bool ContainsKeyUsages(blink::WebCryptoKeyUsageMask a,
                        blink::WebCryptoKeyUsageMask b) {
   return (a & b) == b;