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

LayoutTests/crypto/hmac-export-key.html

Index: LayoutTests/crypto/hmac-export-key.html
diff --git a/LayoutTests/crypto/hmac-export-key.html b/LayoutTests/crypto/hmac-export-key.html
index 7b7097d2a9a1cef6d362e9cda38633aaa55fcbdb..36a94a16cceddf9941d1a2a86e69273f0bf429dc 100644
--- a/LayoutTests/crypto/hmac-export-key.html
+++ b/LayoutTests/crypto/hmac-export-key.html
@@ -21,10 +21,8 @@ var jwkKey = {
     "k": "ahjkn-_387fgnsibf23qsvahjkn-_387fgnsibf23qs"
 };
 
-var jwkKeyAsArrayBuffer = asciiToUint8Array(JSON.stringify(jwkKey));
-
 debug("Importing a JWK key...");
-crypto.subtle.importKey("jwk", jwkKeyAsArrayBuffer, { name: "HMAC", hash: {name: "SHA-256"} }, extractable, ["sign", "verify"]).then(function(result) {
+crypto.subtle.importKey("jwk", jwkKey, { name: "HMAC", hash: {name: "SHA-256"} }, extractable, ["sign", "verify"]).then(function(result) {
     key = result;
 
     return crypto.subtle.exportKey(null, key);
@@ -61,7 +59,7 @@ crypto.subtle.importKey("jwk", jwkKeyAsArrayBuffer, { name: "HMAC", hash: {name:
     shouldBe("exportedJWK.key_ops", "['sign', 'verify']");
 
     debug("\nImporting a key that's not extractable...");
-    return crypto.subtle.importKey("jwk", jwkKeyAsArrayBuffer, { name: "HMAC", hash: {name: "SHA-256"} }, nonExtractable, ["sign", "verify"]);
+    return crypto.subtle.importKey("jwk", jwkKey, { name: "HMAC", hash: {name: "SHA-256"} }, nonExtractable, ["sign", "verify"]);
 }, failAndFinishJSTest).then(function(result) {
     key = result;