Mark flaky chrome_public tests with @RetryOnFailure Batch 4

chrome/android/javatests/src/org/chromium/chrome/browser/preferences/website/ManageSpaceActivityTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/preferences/website/ManageSpaceActivityTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/preferences/website/ManageSpaceActivityTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/preferences/website/ManageSpaceActivityTest.java
index 92767c1382511425d2656997c892370e6b875123..24c6bbde3aa387d85a86180638a1556767e545e8 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/preferences/website/ManageSpaceActivityTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/preferences/website/ManageSpaceActivityTest.java
@@ -15,6 +15,7 @@ import android.test.suitebuilder.annotation.SmallTest;
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.test.util.CommandLineFlags;
 import org.chromium.base.test.util.MinAndroidSdkLevel;
+import org.chromium.base.test.util.RetryOnFailure;
 import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.preferences.PrefServiceBridge;
 import org.chromium.chrome.test.ChromeActivityTestCaseBase;
@@ -101,11 +102,13 @@ public class ManageSpaceActivityTest extends ChromeActivityTestCaseBase<ChromeAc
     }
 
     @SmallTest
+    @RetryOnFailure
     public void testLaunchActivity() {
         startManageSpaceActivity();
     }
 
     @MediumTest
+    @RetryOnFailure
     public void testClearUnimportantOnly() throws Exception {
         final String cookiesUrl =
                 mTestServer.getURL("/chrome/test/data/android/storage_persistance.html");