WebCrypto: Remove support for multi-part operations.

LayoutTests/crypto/importKey.html

Index: LayoutTests/crypto/importKey.html
diff --git a/LayoutTests/crypto/importKey.html b/LayoutTests/crypto/importKey.html
index 6fa7563fa0296ac5a6fa1cada60f1d075f9c4abe..0367bb15bff313e6e1a4f2c13c355f5fade71bc8 100644
--- a/LayoutTests/crypto/importKey.html
+++ b/LayoutTests/crypto/importKey.html
@@ -156,7 +156,7 @@ allTests = [
     function()
     {
         keyFormat = "spki";
-        data = asciiToArrayBuffer("reject");
+        data = asciiToArrayBuffer("error");
         algorithm = aesCbc;
         extractable = false;
         keyUsages = [];
@@ -171,18 +171,6 @@ allTests = [
 
     function()
     {
-        keyFormat = "spki";
-        data = asciiToArrayBuffer("throw");
-        algorithm = aesCbc;
-        extractable = false;
-        keyUsages = [];
-
-        shouldThrow("crypto.subtle.importKey(keyFormat, data, algorithm, extractable, keyUsages)");
-        startNextTest();
-    },
-
-    function()
-    {
         keyFormat = "raw";
         data = asciiToArrayBuffer("");
         algorithm = aesCbc;