[webcrypto] Import WebKit's webcrypto tests.

LayoutTests/crypto/hmac-export-key-expected.txt

Index: LayoutTests/crypto/hmac-export-key-expected.txt
diff --git a/LayoutTests/crypto/hmac-export-key-expected.txt b/LayoutTests/crypto/hmac-export-key-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..25340d22f3a96f21df3451dd6bd4fb16442fa724
--- /dev/null
+++ b/LayoutTests/crypto/hmac-export-key-expected.txt
@@ -0,0 +1,33 @@
+Test exporting an AES key.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+Importing a JWK key...
+error is: SyntaxError: Invalid keyFormat argument
+error is: SyntaxError: Invalid keyFormat argument
+error is: SyntaxError: Invalid keyFormat argument
+error is: SyntaxError: Invalid keyFormat argument
+error is: SyntaxError: Invalid keyFormat argument
+Exporting the key as raw data...
+PASS bytesToHexString(new Uint8Array(exportedData)) is '6a18e49feff7f3b7e09ec89b7f6deab2f6a18e49feff7f3b7e09ec89b7f6deab'
+Exporting the key as JWK...
+PASS exportedJWK.kty is 'oct'
+PASS exportedJWK.k is 'ahjkn-_387fgnsibf23qsvahjkn-_387fgnsibf23qs'
+PASS exportedJWK.alg is 'HS256'
+PASS exportedJWK.ext is true
+PASS exportedJWK.use is undefined
+PASS exportedJWK.key_ops is ['sign', 'verify']
+
+Importing a key that's not extractable...
+
+Trying to export as raw...
+error is: InvalidAccessError: key is not extractable
+PASS Rejected, as expected
+Trying to export as jwk...
+error is: InvalidAccessError: key is not extractable
+PASS Rejected, as expected
+PASS successfullyParsed is true
+
+TEST COMPLETE
+