Rewrite Shadow DOM distribution engine to support partial synchronous distribution for v1

third_party/WebKit/LayoutTests/imported/wpt/shadow-dom/HTMLSlotElement-interface-expected.txt

Index: third_party/WebKit/LayoutTests/imported/wpt/shadow-dom/HTMLSlotElement-interface-expected.txt
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/shadow-dom/HTMLSlotElement-interface-expected.txt b/third_party/WebKit/LayoutTests/imported/wpt/shadow-dom/HTMLSlotElement-interface-expected.txt
deleted file mode 100644
index b17618169682d51f70919c34e9150c5b76b30102..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/imported/wpt/shadow-dom/HTMLSlotElement-interface-expected.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-This is a testharness.js-based test.
-PASS HTMLSlotElement must be defined on window 
-PASS "name" attribute on HTMLSlotElement must reflect "name" attribute 
-PASS assignedNodes() on a HTMLSlotElement must return an empty array when the slot element is not in a tree or in a document tree 
-PASS assignedNodes({"flattened":false}) on a HTMLSlotElement must return an empty array when the slot element is not in a tree or in a document tree 
-PASS assignedNodes({"flattened":true}) on a HTMLSlotElement must return an empty array when the slot element is not in a tree or in a document tree 
-PASS assignedNodes() must return the list of assigned nodes when none of the assigned nodes themselves are slots 
-PASS assignedNodes({"flattened":false}) must return the list of assigned nodes when none of the assigned nodes themselves are slots 
-PASS assignedNodes({"flattened":true}) must return the list of assigned nodes when none of the assigned nodes themselves are slots 
-PASS assignedNodes() must update when slot and name attributes are modified 
-PASS assignedNodes({"flattened":false}) must update when slot and name attributes are modified 
-PASS assignedNodes({"flattened":true}) must update when slot and name attributes are modified 
-PASS assignedNodes must update when a default slot is introduced dynamically by a slot rename 
-PASS assignedNodes must update when a default slot is introduced dynamically by a slot rename 
-PASS assignedNodes must update when a default slot is introduced dynamically by a slot rename 
-FAIL assignedNodes must update when slot elements are inserted or removed assert_array_equals: assignedNodes on a detached formerly-default slot must return an empty array lengths differ, expected 0 got 3
-FAIL assignedNodes must update when slot elements are inserted or removed assert_array_equals: assignedNodes on a detached formerly-default slot must return an empty array lengths differ, expected 0 got 3
-FAIL assignedNodes must update when slot elements are inserted or removed assert_array_equals: assignedNodes on a detached formerly-default slot must return an empty array lengths differ, expected 0 got 3
-FAIL assignedNodes({flatten: true}) must return the distributed nodes, and assignedNodes() and assignedNodes({flatten: false}) must returned the assigned nodes assert_array_equals: assignedNodes() must return an empty array when the slot element is not in any tree lengths differ, expected 0 got 2
-Harness: the test ran to completion.
-