Do not attempt to show search engine dialog if activity is dead.

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 9add290d4de639a0c8c950fee8663ccd808f60ea..ffbdd52ef370d57075f75d6be278c8978cf4ff6c 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
@@ -26,7 +26,6 @@ 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;
@@ -241,7 +240,6 @@ public class FirstRunIntegrationTest {
 
     @Test
     @MediumTest
-    @DisabledTest(message = "crbug.com/718461")
     public void testDefaultSearchEngine_ShowExisting() throws Exception {
         runSearchEnginePromptTest(LocaleManager.SEARCH_ENGINE_PROMO_SHOW_EXISTING);
     }