Revert "Disable NewTabPageTest#testOpenMostVisitedItemInIncognitoTab"

This reverts commit bd5fdccd.

Reason for revert: #testRender is still flaky with this test disabled

Original change's description:
> Disable NewTabPageTest#testOpenMostVisitedItemInIncognitoTab
> 
> This test appears to be causing NewTabPageTest#testRender to flake.
> Spectulatively disabling.
> 
> BUG=813589
> 
> Change-Id: I0bdd566c14d1e6d3521e00e097e55a9f079e76a1
> Reviewed-on: https://chromium-review.googlesource.com/954333
> Reviewed-by: Bernhard Bauer <bauerb@chromium.org>
> Commit-Queue: Theresa <twellington@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#541799}

TBR=bauerb@chromium.org,twellington@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 813589
Change-Id: Idcace61dcf6b0a98c94fddee83bea9d2563ff1c0
Reviewed-on: https://chromium-review.googlesource.com/958007Reviewed-by: Theresa <twellington@chromium.org>
Reviewed-by: Bernhard Bauer <bauerb@chromium.org>
Commit-Queue: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543148}

chrome/android/javatests/src/org/chromium/chrome/browser/ntp/NewTabPageTest.java

@@ -316,7 +316,7 @@ public class NewTabPageTest {
      * Tests opening a most visited item in a new tab.
      */
     @Test
-    @DisabledTest(message = "Flaked on the try bot. http://crbug.com/543138")
+    @DisabledTest // Flaked on the try bot. http://crbug.com/543138
     @SmallTest
     @Feature({"NewTabPage"})
     public void testOpenMostVisitedItemInNewTab() throws InterruptedException {
@@ -328,8 +328,6 @@ public class NewTabPageTest {
      * Tests opening a most visited item in a new incognito tab.
      */
     @Test
-    @DisabledTest(
-            message = "Suspected to be causing #testRender to flake. https://crbug.com/813589.")
     @SmallTest
     @Feature({"NewTabPage"})
     public void testOpenMostVisitedItemInIncognitoTab() throws InterruptedException {