[webcrypto] exportKey() now returns dictionary when format='jwk' (CL 2 of 2).

LayoutTests/crypto/jwk-export-use-values.html

Index: LayoutTests/crypto/jwk-export-use-values.html
diff --git a/LayoutTests/crypto/jwk-export-use-values.html b/LayoutTests/crypto/jwk-export-use-values.html
index 9072fddc5be39ca197dc7d71b806090147ce7e08..c5e4354c556d7ccd10687dc2ccb5efc08f9ba584 100644
--- a/LayoutTests/crypto/jwk-export-use-values.html
+++ b/LayoutTests/crypto/jwk-export-use-values.html
@@ -23,7 +23,7 @@ function testWithAESCBC(usages, expectedKeyOps)
    return crypto.subtle.importKey("raw", aesKeyAsArrayBuffer, {name: "AES-CBC"}, extractable, usages).then(function(result) {
         return crypto.subtle.exportKey("jwk", result);
     }).then(function(result) {
-        jwk = JSON.parse(bytesToASCIIString(result));
+        jwk = result;
         debug(usages + ":");
         shouldBe("jwk.use", "undefined");
         shouldBe("jwk.key_ops", JSON.stringify(expectedKeyOps));
@@ -36,7 +36,7 @@ function testWithHMAC(usages, expectedKeyOps)
     return crypto.subtle.importKey("raw", hmacKeyAsArrayBuffer, {name: 'hmac', hash: {name: 'sha-256'}}, extractable, usages).then(function(result) {
         return crypto.subtle.exportKey("jwk", result);
     }).then(function(result) {
-        jwk = JSON.parse(bytesToASCIIString(result));
+        jwk = result;
         debug(usages + ":");
         shouldBe("jwk.use", "undefined");
         shouldBe("jwk.key_ops", JSON.stringify(expectedKeyOps));