[webcrypto] Import WebKit's webcrypto tests.

LayoutTests/crypto/aes-kw-key-manipulation-expected.txt

Index: LayoutTests/crypto/aes-kw-key-manipulation-expected.txt
diff --git a/LayoutTests/crypto/aes-kw-key-manipulation-expected.txt b/LayoutTests/crypto/aes-kw-key-manipulation-expected.txt
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+++ b/LayoutTests/crypto/aes-kw-key-manipulation-expected.txt
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+Test generating, importing and exporting keys for AES-KW. Test that they can't be used with another algorithm.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+Generating a key...
+PASS key.toString() is '[object Key]'
+PASS key.type is 'secret'
+PASS key.algorithm.name is 'AES-KW'
+PASS key.algorithm.length is 256
+
+Testing that the key can't be used with AES-CBC...
+error is: InvalidAccessError: key.algorithm does not match that of operation
+
+Exporting the key to raw...
+PASS exportedKey.toString() is '[object ArrayBuffer]'
+Importing it back...
+PASS importedKey.toString() is '[object Key]'
+PASS importedKey.type is 'secret'
+PASS importedKey.algorithm.name is 'AES-KW'
+PASS importedKey.algorithm.length is 256
+PASS successfullyParsed is true
+
+TEST COMPLETE
+