Verify spellcheck attribute asynchronously

LayoutTests/editing/spelling/spelling-attribute-at-child-expected.txt

Index: LayoutTests/editing/spelling/spelling-attribute-at-child-expected.txt
diff --git a/LayoutTests/editing/spelling/spelling-attribute-at-child-expected.txt b/LayoutTests/editing/spelling/spelling-attribute-at-child-expected.txt
index 54b4ef8ba3feca26c08faf1282d8eba3d368740d..0ab342385e7295e24989e506c70e081a66be76ad 100644
--- a/LayoutTests/editing/spelling/spelling-attribute-at-child-expected.txt
+++ b/LayoutTests/editing/spelling/spelling-attribute-at-child-expected.txt
@@ -1,18 +1,44 @@
-Tests if the spellchecker behavior change after the spellcheck attribute changed by the script.
+Tests if the spellchecker behaves correctly when child has own spellcheck attribute.
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
-PASS childHasSpellingMarker("<div contentEditable>Foo <span spellcheck='false' id='child'>[]</span> Baz</div>") is false
-PASS childHasSpellingMarker("<div contentEditable>Foo <span id='child'>[]</span> Baz</div>") is true
-PASS childHasSpellingMarker("<div contentEditable>Foo <span spellcheck='true' id='child'>[]</span> Baz</div>") is true
-PASS childHasSpellingMarker("<div spellcheck='false' contentEditable>Foo <span spellcheck='false' id='child'>[]</span> Baz</div>") is false
-PASS childHasSpellingMarker("<div spellcheck='false' contentEditable>Foo <span id='child'>[]</span> Baz</div>") is false
-PASS childHasSpellingMarker("<div spellcheck='false' contentEditable>Foo <span spellcheck='true' id='child'>[]</span> Baz</div>") is true
-PASS childHasSpellingMarker("<div spellcheck='true' contentEditable>Foo <span spellcheck='false' id='child'>[]</span> Baz</div>") is false
-PASS childHasSpellingMarker("<div spellcheck='true' contentEditable>Foo <span id='child'>[]</span> Baz</div>") is true
-PASS childHasSpellingMarker("<div spellcheck='true' contentEditable>Foo <span spellcheck='true' id='child'>[]</span> Baz</div>") is true
+<div contenteditable="">Foo <span spellcheck="false" id="child">[zz ]</span> Baz</div>
+PASS internals.hasSpellingMarker(document, 1, 2) became false
+
+<div contenteditable="">Foo <span id="child">[zz ]</span> Baz</div>
+PASS internals.hasSpellingMarker(document, 1, 2) became true
+
+<div contenteditable="">Foo <span spellcheck="true" id="child">[zz ]</span> Baz</div>
+PASS internals.hasSpellingMarker(document, 1, 2) became true
+
+<div spellcheck="false" contenteditable="">Foo <span spellcheck="false" id="child">[zz ]</span> Baz</div>
+PASS internals.hasSpellingMarker(document, 1, 2) became false
+
+<div spellcheck="false" contenteditable="">Foo <span id="child">[zz ]</span> Baz</div>
+PASS internals.hasSpellingMarker(document, 1, 2) became false
+
+<div spellcheck="false" contenteditable="">Foo <span spellcheck="true" id="child">[zz ]</span> Baz</div>
+PASS internals.hasSpellingMarker(document, 1, 2) became true
+
+<div spellcheck="true" contenteditable="">Foo <span spellcheck="false" id="child">[zz ]</span> Baz</div>
+PASS internals.hasSpellingMarker(document, 1, 2) became false
+
+<div spellcheck="true" contenteditable="">Foo <span id="child">[zz ]</span> Baz</div>
+PASS internals.hasSpellingMarker(document, 1, 2) became true
+
+<div spellcheck="true" contenteditable="">Foo <span spellcheck="true" id="child">[zz ]</span> Baz</div>
+PASS internals.hasSpellingMarker(document, 1, 2) became true
+
 PASS successfullyParsed is true
 
 TEST COMPLETE
-
+Foo [zz ] Baz
+Foo [zz ] Baz
+Foo [zz ] Baz
+Foo [zz ] Baz
+Foo [zz ] Baz
+Foo [zz ] Baz
+Foo [zz ] Baz
+Foo [zz ] Baz
+Foo [zz ] Baz