WebCrypto: Add the KeyPair interface.

LayoutTests/crypto/generateKey.html

Index: LayoutTests/crypto/generateKey.html
diff --git a/LayoutTests/crypto/generateKey.html b/LayoutTests/crypto/generateKey.html
index fd2a424c0934a4db581b86081cb530d35b0c580c..6a14aaaca64f59e856fe82d56baca19259c5f809 100644
--- a/LayoutTests/crypto/generateKey.html
+++ b/LayoutTests/crypto/generateKey.html
@@ -90,6 +90,29 @@ crypto.subtle.generateKey({name: 'aes-cbc', length: 1024.9}, extractable, ['decr
     shouldBe("key.algorithm.hash.name", "'SHA-256'")
     shouldBe("key.algorithm.length", "48")
     shouldBe("key.usages.join(',')", "'sign'")
+
+    return crypto.subtle.generateKey({name: 'RSASSA-PKCS1-v1_5', modulusLength: 10, publicExponent: new Uint8Array([0])}, false, ['sign']);
+}).then(function(result) {
+    keyPair = result;
+
+    shouldBeDefined("keyPair.publicKey");
+    shouldBeDefined("keyPair.privateKey");
+
+    shouldBe("keyPair.publicKey.type", "'public'");
+    shouldBe("keyPair.publicKey.algorithm.name", "'RSASSA-PKCS1-v1_5'");
+
+    shouldBe("keyPair.privateKey.type", "'private'");
+    shouldBe("keyPair.privateKey.algorithm.name", "'RSASSA-PKCS1-v1_5'");
+
+    // KeyPair should return the same Key wrapper
+    keyPair.publicKey.foo = "bar";
+    shouldBe("keyPair.publicKey.foo", "'bar'");
+    if (window.gc) {
+        window.gc();
+        window.gc();
+    }
+    shouldBe("keyPair.publicKey.foo", "'bar'");
+
 }).then(finishJSTest, failAndFinishJSTest);
 
 </script>