[innerText] Add more tests to setter.html.

third_party/WebKit/LayoutTests/external/wpt/innerText/setter-tests.js

Index: third_party/WebKit/LayoutTests/external/wpt/innerText/setter-tests.js
diff --git a/third_party/WebKit/LayoutTests/external/wpt/innerText/setter-tests.js b/third_party/WebKit/LayoutTests/external/wpt/innerText/setter-tests.js
index 9671b23c3464559c126e466b4a5e1be1c34a5dd4..99ae5ec18516ed7b25176da2da49478587ec084f 100644
--- a/third_party/WebKit/LayoutTests/external/wpt/innerText/setter-tests.js
+++ b/third_party/WebKit/LayoutTests/external/wpt/innerText/setter-tests.js
@@ -1,6 +1,7 @@
 testText("<div>", "abc", "abc", "Simplest possible test");
 testHTML("<div>", "abc\ndef", "abc<br>def", "Newlines convert to <br> in non-white-space:pre elements");
 testHTML("<pre>", "abc\ndef", "abc<br>def", "Newlines convert to <br> in <pre> element");
+testHTML("<textarea>", "abc\ndef", "abc<br>def", "Newlines convert to <br> in <textarea> element");
 testHTML("<div style='white-space:pre'>", "abc\ndef", "abc<br>def", "Newlines convert to <br> in white-space:pre element");
 testHTML("<div>", "abc\rdef", "abc<br>def", "CRs convert to <br> in non-white-space:pre elements");
 testHTML("<pre>", "abc\rdef", "abc<br>def", "CRs convert to <br> in <pre> element");