Add/remove spell checking markers in text inputs depending on focus.

LayoutTests/editing/spelling/resources/util.js

 function log(msg)
 {
     document.getElementById("console").innerHTML += (msg + "\n");
 }
 
 function verifySpellTest(nretry)
 {
     var node = window.destination;
     if (window.destination.childNodes.length > 0)
         node = window.destination.childNodes[0];
@@ skipping 16 matching lines @@
     internals.settings.setAsynchronousSpellCheckingEnabled(true);
     internals.settings.setSmartInsertDeleteEnabled(true);
     internals.settings.setSelectTrailingWhitespaceEnabled(false);
     internals.settings.setUnifiedTextCheckerEnabled(true);
     internals.settings.setEditingBehavior("win");
     window.destination = document.getElementById(testElementId);
     window.destination.focus();
     document.execCommand("InsertText", false, testText);
     window.setTimeout(function() { verifySpellTest(10); }, 0);
 }
+
+function findFirstTextNode(node)
+{
+    function iterToFindFirstTextNode(node)
+    {
+        if (node instanceof Text)
+            return node;
+
+        var childNodes = node.childNodes;
+        for (var i = 0; i < childNodes.length; ++i) {
+            var n = iterToFindFirstTextNode(childNodes[i]);
+            if (n)
+                return n;
+        }
+
+        return null;
+    }
+
+    if (node instanceof HTMLInputElement || node instanceof HTMLTextAreaElement) {
+        return iterToFindFirstTextNode(internals.shadowRoot(node));
+    } else {
+        return iterToFindFirstTextNode(node);
+    }
+}
+
+function typeText(elem, text)
+{
+    elem.focus();
+    for (var i = 0; i < text.length; ++i) {
+        typeCharacterCommand(text[i]);
+    }
+}