Revert of 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 1a0fee36c1688a137730592db839b0833f6a682e..75169f35d6609cd62e5ad1ad57e2272bc1442bb9 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
@@ -4,24 +4,14 @@
 
 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.ChromeActivityTestRule;
-import org.chromium.chrome.test.ChromeJUnit4ClassRunner;
+import org.chromium.chrome.test.ChromeActivityTestCaseBase;
 import org.chromium.chrome.test.util.browser.TabTitleObserver;
 import org.chromium.content.browser.test.util.DOMUtils;
 import org.chromium.net.test.EmbeddedTestServer;
@@ -31,43 +21,39 @@
 /**
  *  Simple tests of html5 video.
  */
-@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);
+public class VideoTest extends ChromeActivityTestCaseBase<ChromeActivity> {
 
-    @Test
+    public VideoTest() {
+        super(ChromeActivity.class);
+    }
+
     @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(
-                InstrumentationRegistry.getInstrumentation().getContext());
+                getInstrumentation().getContext());
         try {
-            Tab tab = mActivityTestRule.getActivity().getActivityTab();
+            Tab tab = getActivity().getActivityTab();
             TabTitleObserver titleObserver = new TabTitleObserver(tab, "ready_to_play");
-            mActivityTestRule.loadUrl(
-                    testServer.getURL("/chrome/test/data/android/media/video-play.html"));
+            loadUrl(testServer.getURL("/chrome/test/data/android/media/video-play.html"));
             titleObserver.waitForTitleUpdate(5);
-            Assert.assertEquals("ready_to_play", tab.getTitle());
+            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);
-            Assert.assertEquals("ended", tab.getTitle());
+            assertEquals("ended", tab.getTitle());
         } finally {
             testServer.stopAndDestroyServer();
         }
     }
 
-    @Before
-    public void setUp() throws InterruptedException {
-        mActivityTestRule.startMainActivityOnBlankPage();
+    @Override
+    public void startMainActivity() throws InterruptedException {
+        startMainActivityOnBlankPage();
     }
 }