Ensure the construction of EditableTextNode takes precedence over ComboBoxNode

A node can be both a combo box and editable.
This is given by the
textFieldWithComboBox
role.

R=anastasi@google.com

Bug: 1110157Text
Test: place focus over Gmail's compose dialog and the to text field. Verify an EditableTextNode wrapper is created and not a ComboBoxNode.
Change-Id: Ia6726a5c3e687b225cd3b20d2e5f69300c1a585c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2336957Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: David Tseng <dtseng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795579}

chrome/browser/resources/chromeos/accessibility/switch_access/nodes/node_wrapper.js

@@ -202,13 +202,13 @@ class NodeWrapper extends SAChildNode {
    * @return {!NodeWrapper}
    */
   static create(baseNode, parent) {
-    if (AutomationPredicate.comboBox(baseNode)) {
-      return new ComboBoxNode(baseNode, parent);
-    }
     if (SwitchAccessPredicate.isTextInput(baseNode)) {
       return new EditableTextNode(baseNode, parent);
     }
 
+    if (AutomationPredicate.comboBox(baseNode)) {
+      return new ComboBoxNode(baseNode, parent);
+    }
     switch (baseNode.role) {
       case chrome.automation.RoleType.SLIDER:
         return new SliderNode(baseNode, parent);