Convert ChromeActivityTestCaseBase direct children to JUnit4

chrome/android/javatests/src/org/chromium/chrome/browser/video/VideoTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/video/VideoTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/video/VideoTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/video/VideoTest.java
index 75169f35d6609cd62e5ad1ad57e2272bc1442bb9..1a0fee36c1688a137730592db839b0833f6a682e 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/video/VideoTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/video/VideoTest.java
@@ -4,14 +4,24 @@
 
 package org.chromium.chrome.browser.video;
 
+import android.support.test.InstrumentationRegistry;
 import android.support.test.filters.LargeTest;
 
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.chromium.base.test.util.CommandLineFlags;
 import org.chromium.base.test.util.DisableIf;
 import org.chromium.base.test.util.Feature;
 import org.chromium.base.test.util.RetryOnFailure;
 import org.chromium.chrome.browser.ChromeActivity;
+import org.chromium.chrome.browser.ChromeSwitches;
 import org.chromium.chrome.browser.tab.Tab;
-import org.chromium.chrome.test.ChromeActivityTestCaseBase;
+import org.chromium.chrome.test.ChromeActivityTestRule;
+import org.chromium.chrome.test.ChromeJUnit4ClassRunner;
 import org.chromium.chrome.test.util.browser.TabTitleObserver;
 import org.chromium.content.browser.test.util.DOMUtils;
 import org.chromium.net.test.EmbeddedTestServer;
@@ -21,39 +31,43 @@ import java.util.concurrent.TimeoutException;
 /**
  *  Simple tests of html5 video.
  */
-public class VideoTest extends ChromeActivityTestCaseBase<ChromeActivity> {
-
-    public VideoTest() {
-        super(ChromeActivity.class);
-    }
+@RunWith(ChromeJUnit4ClassRunner.class)
+@CommandLineFlags.Add({ChromeSwitches.DISABLE_FIRST_RUN_EXPERIENCE,
+        ChromeActivityTestRule.DISABLE_NETWORK_PREDICTION_FLAG})
+public class VideoTest {
+    @Rule
+    public ChromeActivityTestRule<ChromeActivity> mActivityTestRule =
+            new ChromeActivityTestRule<>(ChromeActivity.class);
 
+    @Test
     @DisableIf.Build(sdk_is_less_than = 19, message = "crbug.com/582067")
     @Feature({"Media", "Media-Video", "Main"})
     @LargeTest
     @RetryOnFailure
     public void testLoadMediaUrl() throws InterruptedException, TimeoutException {
         EmbeddedTestServer testServer = EmbeddedTestServer.createAndStartServer(
-                getInstrumentation().getContext());
+                InstrumentationRegistry.getInstrumentation().getContext());
         try {
-            Tab tab = getActivity().getActivityTab();
+            Tab tab = mActivityTestRule.getActivity().getActivityTab();
             TabTitleObserver titleObserver = new TabTitleObserver(tab, "ready_to_play");
-            loadUrl(testServer.getURL("/chrome/test/data/android/media/video-play.html"));
+            mActivityTestRule.loadUrl(
+                    testServer.getURL("/chrome/test/data/android/media/video-play.html"));
             titleObserver.waitForTitleUpdate(5);
-            assertEquals("ready_to_play", tab.getTitle());
+            Assert.assertEquals("ready_to_play", tab.getTitle());
 
             titleObserver = new TabTitleObserver(tab, "ended");
             DOMUtils.clickNode(tab.getContentViewCore(), "button1");
             // Now the video will play for 5 secs.
             // Makes sure that the video ends and title was changed.
             titleObserver.waitForTitleUpdate(15);
-            assertEquals("ended", tab.getTitle());
+            Assert.assertEquals("ended", tab.getTitle());
         } finally {
             testServer.stopAndDestroyServer();
         }
     }
 
-    @Override
-    public void startMainActivity() throws InterruptedException {
-        startMainActivityOnBlankPage();
+    @Before
+    public void setUp() throws InterruptedException {
+        mActivityTestRule.startMainActivityOnBlankPage();
     }
 }