Move expectations for test that hit !m_visibleDescendantStatusDirty assertion,
because locally, this also happens in WK1.

* TestExpectations:
* platform/wk2/TestExpectations:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@177247 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/LayoutTests/TestExpectations b/LayoutTests/TestExpectations
index 684cba3..a6a80b5 100644
--- a/LayoutTests/TestExpectations
+++ b/LayoutTests/TestExpectations
@@ -322,3 +322,7 @@
 webkit.org/b/139548 [ MountainLion Mavericks ] fast/workers/worker-constructor.html [ Skip ]
 
 webkit.org/b/139595 http/tests/xmlhttprequest/workers/abort-exception-assert.html [ Pass Failure Timeout ]
+
+# Crashes in Debug builds, <rdar://problem/18216390>
+[ Debug ] fast/history/go-back-to-iframe-with-plugin.html [ Skip ]
+[ Debug ] fast/history/history-back-while-pdf-in-pagecache.html [ Skip ]