Mark a FirstRunIntegrationTest flaky

chrome/android/javatests/src/org/chromium/chrome/browser/firstrun/FirstRunIntegrationTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/firstrun/FirstRunIntegrationTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/firstrun/FirstRunIntegrationTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/firstrun/FirstRunIntegrationTest.java
index 19cd037d72258169da74496878d793d14b32f960..c7a1bdfef9ea161976913fc66c5bc04663cd32c4 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/firstrun/FirstRunIntegrationTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/firstrun/FirstRunIntegrationTest.java
@@ -27,6 +27,7 @@ import org.junit.runner.RunWith;
 
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.annotations.SuppressFBWarnings;
+import org.chromium.base.test.util.DisabledTest;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ChromeTabbedActivity;
 import org.chromium.chrome.browser.customtabs.CustomTabActivity;
@@ -240,8 +241,9 @@ public class FirstRunIntegrationTest {
         runSearchEnginePromptTest(LocaleManager.SEARCH_ENGINE_PROMO_DONT_SHOW);
     }
 
-    @Test
-    @MediumTest
+    // @Test
+    // @MediumTest
+    @DisabledTest // crbug.com/718461
     public void testDefaultSearchEngine_ShowExisting() throws Exception {
         runSearchEnginePromptTest(LocaleManager.SEARCH_ENGINE_PROMO_SHOW_EXISTING);
     }