Only show a beforeunload dialog if a frame has had a user gesture since its load.

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

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * Test suite for displaying and functioning of modal dialogs.
  */
 
 package org.chromium.android_webview.test;
 
 import android.support.test.filters.MediumTest;
 import android.support.test.filters.SmallTest;
 
 import org.chromium.android_webview.AwContents;
 import org.chromium.android_webview.JsPromptResultReceiver;
 import org.chromium.android_webview.JsResultReceiver;
+import org.chromium.android_webview.test.util.AwTestTouchUtils;
 import org.chromium.base.test.util.CallbackHelper;
 import org.chromium.base.test.util.Feature;
 
 import java.util.concurrent.atomic.AtomicBoolean;
 
 /**
  * Tests for callbacks implementing JS alerts and prompts.
  */
 public class WebViewModalDialogOverrideTest extends AwTestBase {
     private static final String EMPTY_PAGE =
@@ skipping 142 matching lines @@
                 jsBeforeUnloadHelper.notifyCalled();
             }
         };
         AwTestContainerView view = createAwTestContainerViewOnMainSync(client);
         final AwContents awContents = view.getAwContents();
         enableJavaScriptOnUiThread(awContents);
 
         loadDataSync(awContents, client.getOnPageFinishedHelper(), BEFORE_UNLOAD_URL,
                 "text/html", false);
         enableJavaScriptOnUiThread(awContents);
+        AwTestTouchUtils.simulateTouchCenterOfView(view);

[boliu, 2017/04/06 21:30:13]

should write a comment explaining this?

[Avi (use Gerrit), 2017/04/06 22:29:19]

Done.

 
         // Don't wait synchronously because we don't leave the page.
         int currentCallCount = jsBeforeUnloadHelper.getCallCount();
         loadDataAsync(awContents, EMPTY_PAGE, "text/html", false);
         jsBeforeUnloadHelper.waitForCallback(currentCallCount);
     }
 }