Download location: enable flaky tests in DownloadActivityTest.

The CL that causes the flakiness has been reverted. See:
https://chromium-review.googlesource.com/c/chromium/src/+/1112777
Landed as e4144ed1.

This CL enables flaky tests in DownloadActivityTest.

TBR=dtrainor@chromium.org

Bug: 855389,855219,855168,855167
Change-Id: Id53085ed71c5188cd1e7588998bda6f00c7b89a5
Reviewed-on: https://chromium-review.googlesource.com/1113910Reviewed-by: Xing Liu <xingliu@chromium.org>
Commit-Queue: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570107}

chrome/android/javatests/src/org/chromium/chrome/browser/download/DownloadActivityTest.java

@@ -28,8 +28,6 @@ import org.junit.runner.RunWith;
 import org.chromium.base.ContextUtils;
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.test.util.CallbackHelper;
-import org.chromium.base.test.util.DisabledTest;
-import org.chromium.base.test.util.FlakyTest;
 import org.chromium.base.test.util.Restriction;
 import org.chromium.base.test.util.RetryOnFailure;
 import org.chromium.chrome.R;
@@ -160,7 +158,6 @@ public class DownloadActivityTest {
 
     @Test
     @MediumTest
-    @FlakyTest(message = "crbug.com/855168")
     public void testSpaceDisplay() throws Exception {
         // This first check is a Criteria because initialization of the Adapter is asynchronous.
         CriteriaHelper.pollUiThread(new Criteria() {
@@ -220,7 +217,6 @@ public class DownloadActivityTest {
     }
 
     /** Clicking on filters affects various things in the UI. */
-    @DisabledTest(message = "crbug.com/855389")
     @Test
     @MediumTest
     public void testFilters() throws Exception {
@@ -255,7 +251,6 @@ public class DownloadActivityTest {
     @Test
     @MediumTest
     @RetryOnFailure
-    @FlakyTest(message = "crbug.com/854241")
     public void testDeleteFiles() throws Exception {
         SnackbarManager.setDurationForTesting(1);
 
@@ -295,7 +290,6 @@ public class DownloadActivityTest {
     @Test
     @MediumTest
     @RetryOnFailure
-    @FlakyTest(message = "crbug.com/855219")
     public void testDeleteFileFromMenu() throws Exception {
         SnackbarManager.setDurationForTesting(1);
 
@@ -327,7 +321,6 @@ public class DownloadActivityTest {
         Assert.assertEquals("5.00 GB downloaded", mSpaceUsedDisplay.getText());
     }
 
-    @DisabledTest(message = "crbug.com/855389")
     @Test
     @MediumTest
     @RetryOnFailure
@@ -398,7 +391,6 @@ public class DownloadActivityTest {
         Assert.assertEquals("6.50 GB downloaded", mSpaceUsedDisplay.getText());
     }
 
-    @DisabledTest(message = "crbug.com/855389")
     @Test
     @MediumTest
     @RetryOnFailure
@@ -464,7 +456,6 @@ public class DownloadActivityTest {
         Assert.assertEquals("6.50 GB downloaded", mSpaceUsedDisplay.getText());
     }
 
-    @DisabledTest(message = "crbug.com/855389")
     @Test
     @MediumTest
     @RetryOnFailure
@@ -530,7 +521,6 @@ public class DownloadActivityTest {
     @Test
     @MediumTest
     @DisableFeatures("OfflinePagesSharing")
-    @FlakyTest(message = "crbug.com/855167")
     public void testShareFiles() throws Exception {
         // Adapter positions:
         // 0 = space display
@@ -605,7 +595,6 @@ public class DownloadActivityTest {
 
     // TODO(carlosk): OfflineItems used here come from StubbedProvider so this might not be the best
     // place to test peer-2-peer sharing.
-    @DisabledTest(message = "crbug.com/855389")
     @Test
     @MediumTest
     @EnableFeatures("OfflinePagesSharing")