Update TestExpectations for two http/tests/xmlhttprequest/response-* tests.

Unreviewed test gardening.

* platform/mac-wk1/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@222611 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
index 1a70b39..f76861f 100644
--- a/LayoutTests/ChangeLog
+++ b/LayoutTests/ChangeLog
@@ -1,3 +1,11 @@
+2017-09-28  Ryan Haddad  <ryanhaddad@apple.com>
+
+        Update TestExpectations for two http/tests/xmlhttprequest/response-* tests.
+
+        Unreviewed test gardening.
+
+        * platform/mac-wk1/TestExpectations:
+
 2017-09-27  Fujii Hironori  <Hironori.Fujii@sony.com>
 
         [REGRESSION] word-spacing property is incorrectly applied
diff --git a/LayoutTests/platform/mac-wk1/TestExpectations b/LayoutTests/platform/mac-wk1/TestExpectations
index 974a806..54fc4ef 100644
--- a/LayoutTests/platform/mac-wk1/TestExpectations
+++ b/LayoutTests/platform/mac-wk1/TestExpectations
@@ -441,3 +441,6 @@
 [ HighSierra+ ] fast/events/keydown-leftright-keys.html [ Crash ]
 [ HighSierra+ ] fast/forms/textarea-maxlength.html [ Crash ]
 [ HighSierra+ ] fast/text/system-font-fallback-emoji.html [ Crash ]
+
+webkit.org/b/177563 [ HighSierra ] http/tests/xmlhttprequest/response-empty-arraybuffer.html [ Failure ]
+webkit.org/b/177564 [ HighSierra ] http/tests/xmlhttprequest/response-encoding.htm [ Skip ]