Fixes redirects to external apps when navigating from PWA.

chrome/android/javatests/src/org/chromium/chrome/browser/webapps/TopActivityListener.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/webapps/TopActivityListener.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/TopActivityListener.java b/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/TopActivityListener.java
deleted file mode 100644
index e746f7ef9e885cf561e4b790229c33aee216002c..0000000000000000000000000000000000000000
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/TopActivityListener.java
+++ /dev/null
@@ -1,64 +0,0 @@
-// Copyright 2017 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.
-
-package org.chromium.chrome.browser.webapps;
-
-import android.app.Activity;
-
-import org.junit.rules.TestRule;
-import org.junit.runner.Description;
-import org.junit.runners.model.Statement;
-
-import org.chromium.base.ActivityState;
-import org.chromium.base.ApplicationStatus;
-import org.chromium.base.ApplicationStatus.ActivityStateListener;
-import org.chromium.content.browser.test.util.Criteria;
-import org.chromium.content.browser.test.util.CriteriaHelper;
-
-import javax.annotation.Nullable;
-
-/**
- * Test rule tracking which Chrome activity is currently at the top of the task.
- */
-public class TopActivityListener implements TestRule {
-    private final ActivityStateListener mListener = new ActivityStateListener() {
-        @Override
-        public void onActivityStateChange(Activity activity, int newState) {
-            if (newState == ActivityState.RESUMED) {
-                mMostRecentActivity = activity;
-            }
-        }
-    };
-
-    private Activity mMostRecentActivity;
-
-    @Override
-    public Statement apply(final Statement base, Description description) {
-        return new Statement() {
-            @Override
-            public void evaluate() throws Throwable {
-                ApplicationStatus.registerStateListenerForAllActivities(mListener);
-                base.evaluate();
-                ApplicationStatus.unregisterActivityStateListener(mListener);
-            }
-        };
-    }
-
-    @Nullable
-    public Activity getMostRecentActivity() {
-        return mMostRecentActivity;
-    }
-
-    @SuppressWarnings("unchecked")
-    public <T extends Activity> T waitFor(final Class<T> expectedActivityClass) {
-        CriteriaHelper.pollUiThread(new Criteria() {
-            @Override
-            public boolean isSatisfied() {
-                return mMostRecentActivity != null
-                        && expectedActivityClass.isAssignableFrom(mMostRecentActivity.getClass());
-            }
-        });
-        return (T) mMostRecentActivity;
-    }
-}