[WebCrypto] Crypto tests updated to use KeyUsage

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 d7393451eff4652556c473a164eed042db095e47..b0dc1bddfe0db4a044a669fa4b81e96bfdb5e72d 100644
--- a/LayoutTests/crypto/hmac-export-key.html
+++ b/LayoutTests/crypto/hmac-export-key.html
@@ -24,6 +24,7 @@ var jwkKey = {
 debug("Importing a JWK key...");
 crypto.subtle.importKey("jwk", jwkKey, { name: "HMAC", hash: {name: "SHA-256"} }, extractable, ["sign", "verify"]).then(function(result) {
     key = result;
+    console.log(JSON.stringify(result));
 
     return crypto.subtle.exportKey(null, key);
 }).then(failAndFinishJSTest, function(result) {
@@ -62,7 +63,7 @@ crypto.subtle.importKey("jwk", jwkKey, { name: "HMAC", hash: {name: "SHA-256"} }
     return crypto.subtle.importKey("jwk", jwkKey, { name: "HMAC", hash: {name: "SHA-256"} }, nonExtractable, ["sign", "verify"]);
 }, failAndFinishJSTest).then(function(result) {
     key = result;
-
+    console.log(JSON.stringify(result));
     debug("\nTrying to export as raw...");
     return crypto.subtle.exportKey("raw", key);
 }).then(function(result) {