[webcrypto] Require importKey() for JWK to provide data as a Javascript object rather than a JSON a…

LayoutTests/crypto/aes-cbc-wrap-rsa.html

Index: LayoutTests/crypto/aes-cbc-wrap-rsa.html
diff --git a/LayoutTests/crypto/aes-cbc-wrap-rsa.html b/LayoutTests/crypto/aes-cbc-wrap-rsa.html
index a4439770208928af9aa692386bebd8eefe0b4514..bf622e4e8595b60b8b46fd7a9b774c3ea1082f0c 100644
--- a/LayoutTests/crypto/aes-cbc-wrap-rsa.html
+++ b/LayoutTests/crypto/aes-cbc-wrap-rsa.html
@@ -25,12 +25,11 @@ var publicKeyJSON = {
     use: "sig"
 };
 
-var jwkKeyAsArrayBuffer = asciiToUint8Array(JSON.stringify(publicKeyJSON));
 var wrappingKeyOctets = hexStringToUint8Array("2a00e0e776e94e4dc89bf947cebdebe1");
 
 debug("Importing a key to wrap...");
 
-crypto.subtle.importKey("jwk", jwkKeyAsArrayBuffer, { name: "RSASSA-PKCS1-v1_5", hash: {name: "Sha-256"} }, extractable, ["verify"]).then(function(result) {
+crypto.subtle.importKey("jwk", publicKeyJSON, { name: "RSASSA-PKCS1-v1_5", hash: {name: "Sha-256"} }, extractable, ["verify"]).then(function(result) {
     key = result;
     shouldBe("key.algorithm.name", "'RSASSA-PKCS1-v1_5'");
     debug("Importing a key encryption key...");