Re-enable ChromeVoxEditingTest.CharacterTypedAfterNewLine

TBR=dtseng@chromium.org

Fixed: 1033649
Change-Id: I713ef317499a7ae027ddf63594ee5e8948ede8a1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2119265Reviewed-by: David Tseng <dtseng@chromium.org>
Commit-Queue: David Tseng <dtseng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#753111}

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

@@ -1306,9 +1306,8 @@ TEST_F('ChromeVoxEditingTest', 'GrammarErrors', function() {
       });
 });
 
-// TODO(https://crbug.com/1033649) flaky on linux-chromeos-rel/dbg.
 TEST_F(
-    'ChromeVoxEditingTest', 'DISABLED_CharacterTypedAfterNewLine', function() {
+    'ChromeVoxEditingTest', 'CharacterTypedAfterNewLine', function() {
       const mockFeedback = this.createMockFeedback();
       this.runWithLoadedTree(
           `