Webcrypto: add layout tests for HKDF algorithm

LayoutTests/TestExpectations

Index: LayoutTests/TestExpectations
diff --git a/LayoutTests/TestExpectations b/LayoutTests/TestExpectations
index be2b249a10df965cde6958f3742f2d4843599198..f5dd5c07443446fec0b9a7c8b6652d2bbc716ab1 100644
--- a/LayoutTests/TestExpectations
+++ b/LayoutTests/TestExpectations
@@ -619,6 +619,13 @@ crbug.com/338883 [ Linux ] crypto/subtle/ecdh-import-jwk.html [ Failure Pass ]
 crbug.com/338883 [ Linux ] crypto/subtle/ecdh-deriveKey-aes.html [ Failure Pass ]
 crbug.com/338883 [ Linux ] crypto/subtle/ecdh-deriveKey-failures.html [ Failure Pass ]
 crbug.com/338883 [ Linux ] crypto/subtle/ecdh-deriveKey-hmac.html [ Failure Pass ]
+crbug.com/338887 [ Linux ] crypto/subtle/clone-hkdfKey.html [ Failure Pass ]
+crbug.com/338887 [ Linux ] crypto/subtle/hkdf-deriveBits-failures.html [ Failure Pass ]
+crbug.com/338887 [ Linux ] crypto/subtle/hkdf-deriveBits.html [ Failure Pass ]
+crbug.com/338887 [ Linux ] crypto/subtle/hkdf-deriveKey.html [ Failure Pass ]
+crbug.com/338887 [ Linux ] crypto/subtle/hkdf-failures.html [ Failure Pass ]

[eroman, 2015/01/07 01:18:42]

Naming issue: there is hkdf-deriveBits-failures and hdkf-failures. Unclear what
the intended difference is.

[nharper, 2015/01/09 22:41:46]

Renamed tests.

+crbug.com/338887 [ Linux ] crypto/subtle/hkdf-importKey.html [ Failure Pass ]

[eroman, 2015/01/07 01:18:42]

Please also add export tests.

[nharper, 2015/01/09 22:41:46]

I'm not sure what export tests you want - calling exportKey() on an HKDF key
should fail (according to the spec), and this is tested in hkdf-exportKey.html
(formerly hkdf-failures.html).

[eroman, 2015/01/12 22:35:22]

That is sufficient.

+crbug.com/338887 [ Linux ] crypto/subtle/hkdf-unwrapKey.html [ Failure Pass ]
 
 # There are some unresolved problems with the teardown of WebWorkers that make
 # the "abandon" WebCrypto tests flaky-crash. This flakiness can also affect the