Revert of Disable tabmodel.UndoTabModelTest#testReverseOrderRestore

chrome/android/javatests/src/org/chromium/chrome/browser/tabmodel/UndoTabModelTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/tabmodel/UndoTabModelTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/tabmodel/UndoTabModelTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/tabmodel/UndoTabModelTest.java
index 58211daea3e1297afa44518e8ade097bfe9c969a..311488bc85ceef88fc4ae5d273021ced19d8c1b6 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/tabmodel/UndoTabModelTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/tabmodel/UndoTabModelTest.java
@@ -777,9 +777,8 @@
      *
      * @throws InterruptedException
      */
-    // @MediumTest
-    // @Restriction(ChromeRestriction.RESTRICTION_TYPE_PHONE) // See crbug.com/633607
-    @DisabledTest(message = "crbug.com/673729")
+    @MediumTest
+    @Restriction(ChromeRestriction.RESTRICTION_TYPE_PHONE) // See crbug.com/633607
     public void testReverseOrderRestore() throws InterruptedException {
         TabModel model = getActivity().getTabModelSelector().getModel(false);
         ChromeTabCreator tabCreator = getActivity().getTabCreator(false);