Mark flaky android_webview_test as @RetryOnFailure

android_webview/javatests/src/org/chromium/android_webview/test/PopupWindowTest.java

Index: android_webview/javatests/src/org/chromium/android_webview/test/PopupWindowTest.java
diff --git a/android_webview/javatests/src/org/chromium/android_webview/test/PopupWindowTest.java b/android_webview/javatests/src/org/chromium/android_webview/test/PopupWindowTest.java
index 6c5c793b38839680b702fb193a76ea04234bf789..8094f4b935b5e5d1453c1ed9b5c6f249b059a3e5 100644
--- a/android_webview/javatests/src/org/chromium/android_webview/test/PopupWindowTest.java
+++ b/android_webview/javatests/src/org/chromium/android_webview/test/PopupWindowTest.java
@@ -9,6 +9,7 @@ import android.test.suitebuilder.annotation.SmallTest;
 import org.chromium.android_webview.AwContents;
 import org.chromium.android_webview.test.util.CommonResources;
 import org.chromium.base.test.util.Feature;
+import org.chromium.base.test.util.RetryOnFailure;
 import org.chromium.content.browser.ContentViewCore;
 import org.chromium.content.browser.test.util.Criteria;
 import org.chromium.content.browser.test.util.CriteriaHelper;
@@ -67,6 +68,7 @@ public class PopupWindowTest extends AwTestBase {
 
     @SmallTest
     @Feature({"AndroidWebView"})
+    @RetryOnFailure
     public void testOnPageFinishedCalledOnDomModificationAfterNavigation() throws Throwable {
         final String popupPath = "/popup.html";
         final String parentPageHtml = CommonResources.makeHtmlPageFrom("", "<script>"