Layout Test imported/w3c/web-platform-tests/streams/piping/error-prop…

…agation-backward.html is flaky

https://bugs.webkit.org/show_bug.cgi?id=188070

Unreviewed test gardening.

* platform/ios/TestExpectations: Mark test as flaky.
* platform/mac-wk1/TestExpectations: Ditto.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@236000 268f45cc-cd09-0410-ab3c-d52691b4dbfc

LayoutTests/ChangeLog

@@ -1,3 +1,13 @@
+2018-09-13  Ryan Haddad  <ryanhaddad@apple.com>
+
+        Layout Test imported/w3c/web-platform-tests/streams/piping/error-propagation-backward.html is flaky
+        https://bugs.webkit.org/show_bug.cgi?id=188070
+
+        Unreviewed test gardening.
+
+        * platform/ios/TestExpectations: Mark test as flaky.
+        * platform/mac-wk1/TestExpectations: Ditto.
+
 2018-09-13  Megan Gardner  <megan_gardner@apple.com>
 
         Fix color stop blending in conic gradients for stops past 1

LayoutTests/platform/ios/TestExpectations

@@ -3137,3 +3137,5 @@ webkit.org/b/188578 svg/custom/scrolling-embedded-svg-file-image-repaint-problem
 webkit.org/b/188762 fast/writing-mode/english-rl-text-with-spelling-marker.html [ ImageOnlyFailure ]
 
 webkit.org/b/128312 media/video-load-preload-metadata.html [ Pass Failure ]
+
+webkit.org/b/188070 imported/w3c/web-platform-tests/streams/piping/error-propagation-backward.html [ Pass Failure ]

LayoutTests/platform/mac-wk1/TestExpectations

@@ -616,3 +616,5 @@ webkit.org/b/189087 svg/animations/animate-end-attribute-numeric-precision.html
 
 webkit.org/b/188008 fast/text/variations/ipc2.html [ Skip ]
 webkit.org/b/189594 imported/w3c/web-platform-tests/css/css-animations/pending-style-changes-001.html [ Pass Failure ]
+
+webkit.org/b/188070 imported/w3c/web-platform-tests/streams/piping/error-propagation-backward.html [ Pass Failure ]