parent->addChild() can delete parent and any of its siblings

third_party/WebKit/LayoutTests/TestExpectations

 # ====== Oilpan-only failures from here ======
 # Most of these actually cause the tests to report success, rather than
 # failure. Expected outputs will be adjusted for the better once Oilpan
 # has been well and truly enabled always.
 
 # With Oilpan, the parent pointer in the CSSRule hierarchy is
 # strong. This is the intended behavior.
 crbug.com/345630 fast/dom/StyleSheet/gc-parent-rule.html [ Failure ]
 crbug.com/345630 fast/dom/StyleSheet/gc-parent-stylesheet.html [ Failure ]
 crbug.com/345655 fast/dom/StyleSheet/detached-parent-rule-without-wrapper.html [ Failure ]
@@ skipping 264 matching lines @@
 crbug.com/542541 [ Debug ] virtual/pointerevent/fast/events/click-count.html [ Pass Failure ]
 
 # TODO(oshima): Mac Android are currently not supported.
 crbug.com/567837 [ Mac Android ] virtual/scalefactor200withzoom/fast/hidpi/static [ Skip ]
 
 # TODO(oshima): Debug build generates slightly different image for these tests.
 crbug.com/593567 [ Debug ] virtual/scalefactor150/fast/hidpi/static/calendar-picker-appearance.html [ Skip ]
 crbug.com/593567 [ Debug ] virtual/scalefactor150/fast/hidpi/static/data-suggestion-picker-appearance.html [ Skip ]
 crbug.com/593567 [ Debug ] virtual/scalefactor150/fast/hidpi/static/popup-menu-appearance.html [ Skip ]
 
+crbug.com/602771 editing/execCommand/create-list-with-hr.html [ NeedsRebaseline ]
+
 # Mac does not support fractional scale factor.
 crbug.com/567837 [ Mac ] virtual/scalefactor150/fast/hidpi/static [ Skip ]
 
 # TODO(oshima): Move the event scaling code to eventSender and remove this.
 crbug.com/567837 virtual/scalefactor200/fast/hidpi/static/mousewheel-scroll-amount.html [ Skip ]
 crbug.com/567837 virtual/scalefactor200/fast/hidpi/static/gesture-scroll-amount.html [ Skip ]
 crbug.com/567837 virtual/scalefactor150/fast/hidpi/static/mousewheel-scroll-amount.html [ Skip ]
 crbug.com/567837 virtual/scalefactor150/fast/hidpi/static/gesture-scroll-amount.html [ Skip ]
 
 # TODO(ojan): These tests aren't flaky. See crbug.com/517144.
@@ skipping 1276 matching lines @@
 crbug.com/601166 [ Mac10.9 ]  fast/text/whitespace/span-in-word-space-causes-overflow.html [ Failure ]
 crbug.com/601166 [ Mac10.9 ]  fast/text/wide-zero-width-space.html [ Failure ]
 crbug.com/601166 [ Mac10.9 ]  fast/text/word-break-run-rounding.html [ Failure ]
 crbug.com/601166 [ Mac10.9 ]  fast/text/word-break-soft-hyphen.html [ Failure ]
 crbug.com/601166 [ Mac10.9 ]  fast/text/word-break.html [ Failure ]
 crbug.com/601166 [ Mac10.9 ]  fast/text/word-space.html [ Failure ]
 crbug.com/601166 [ Mac10.9 ]  fast/text/zero-font-size.html [ Failure ]
 crbug.com/601166 [ Mac10.9 ]  ietestcenter/css3/text/textshadow-003.htm [ Failure ]
 crbug.com/601166 [ Mac10.9 ]  ietestcenter/css3/text/textshadow-004.htm [ Failure ]