Mark two ChromeVoxEditingTest as disabled

Bug: 1143192
Change-Id: Ic26cb52ff89f80aacdfb65a1611ddb6b68e27490
Tbr: nektar, dmazzoni
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2503735Reviewed-by: Dominik Röttsches <drott@chromium.org>
Commit-Queue: Dominik Röttsches <drott@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821679}

chrome/browser/resources/chromeos/accessibility/chromevox/background/editing_test.js

@@ -1523,7 +1523,8 @@ TEST_F('ChromeVoxEditingTest', 'InputEvents', function() {
   });
 });
 
-TEST_F('ChromeVoxEditingTest', 'TextAreaEvents', function() {
+// Flaky test, see https://crbug.com/1143192
+TEST_F('ChromeVoxEditingTest', 'DISABLED_TextAreaEvents', function() {
   const site = `<textarea></textarea>`;
   this.runWithLoadedTree(site, async function(root) {
     const textArea = root.find({role: RoleType.TEXT_FIELD});
@@ -1563,7 +1564,8 @@ TEST_F('ChromeVoxEditingTest', 'TextAreaEvents', function() {
   });
 });
 
-TEST_F('ChromeVoxEditingTest', 'ContentEditableEvents', function() {
+// Flaky test, see https://crbug.com/1143192
+TEST_F('ChromeVoxEditingTest', 'DISABLED_ContentEditableEvents', function() {
   const site = `<div role="textbox" contenteditable></div>`;
   this.runWithLoadedTree(site, async function(root) {
     const contentEditable = root.find({role: RoleType.TEXT_FIELD});