Drop [LegacyInterfaceTypeChecking] for HTMLTableElement

third_party/WebKit/LayoutTests/fast/dom/HTMLTableElement/exceptions.html

Index: third_party/WebKit/LayoutTests/fast/dom/HTMLTableElement/exceptions.html
diff --git a/third_party/WebKit/LayoutTests/fast/dom/HTMLTableElement/exceptions.html b/third_party/WebKit/LayoutTests/fast/dom/HTMLTableElement/exceptions.html
index 52362810b855886a23f8389a8d289733cbedf8ed..b2389f0d11fee99bfa1b4687d3e217e53ad43f3f 100644
--- a/third_party/WebKit/LayoutTests/fast/dom/HTMLTableElement/exceptions.html
+++ b/third_party/WebKit/LayoutTests/fast/dom/HTMLTableElement/exceptions.html
@@ -9,6 +9,17 @@
 
         var t = document.createElement('table');
 
+        // TODO(philipj): Setting caption/tHead/tFoot to null should not throw
+        // an exception, it should just remove the old caption/thead/tfoot.
+        shouldThrow("t.caption = null");
+        shouldThrow("t.caption = document.body");
+
+        shouldThrow("t.tHead = null");
+        shouldThrow("t.tHead = document.body");
+
+        shouldThrow("t.tFoot = null");
+        shouldThrow("t.tFoot = document.body");
+
         shouldThrow("t.insertRow(-2)");
         shouldThrow("t.insertRow(1)");