Revert of Convert ChromeActivityTestCaseBase direct children to JUnit4

chrome/android/javatests/src/org/chromium/chrome/browser/AudioTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/AudioTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/AudioTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/AudioTest.java
index f2a69ea8fcaa5058ab263f4b3781392c7fd7fa4d..2465227c6ca82c89361a36453d2191cbbb7ef9b2 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/AudioTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/AudioTest.java
@@ -4,20 +4,9 @@
 
 package org.chromium.chrome.browser;
 
-import android.support.test.InstrumentationRegistry;
-
-import org.junit.After;
-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.FlakyTest;
 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;
@@ -27,26 +16,24 @@
 /**
  * Simple HTML5 audio tests.
  */
-@RunWith(ChromeJUnit4ClassRunner.class)
-@CommandLineFlags.Add({ChromeSwitches.DISABLE_FIRST_RUN_EXPERIENCE,
-        ChromeActivityTestRule.DISABLE_NETWORK_PREDICTION_FLAG})
-public class AudioTest {
-    @Rule
-    public ChromeActivityTestRule<ChromeActivity> mActivityTestRule =
-            new ChromeActivityTestRule<>(ChromeActivity.class);
+public class AudioTest extends ChromeActivityTestCaseBase<ChromeActivity> {
 
     private EmbeddedTestServer mTestServer;
 
-    @Before
-    public void setUp() throws Exception {
-        mActivityTestRule.startMainActivityOnBlankPage();
-        mTestServer = EmbeddedTestServer.createAndStartServer(
-                InstrumentationRegistry.getInstrumentation().getContext());
+    public AudioTest() {
+        super(ChromeActivity.class);
     }
 
-    @After
-    public void tearDown() throws Exception {
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        mTestServer = EmbeddedTestServer.createAndStartServer(getInstrumentation().getContext());
+    }
+
+    @Override
+    protected void tearDown() throws Exception {
         mTestServer.stopAndDestroyServer();
+        super.tearDown();
     }
 
     /**
@@ -55,21 +42,24 @@
      * @MediumTest
      */
     // TODO(jbudorick): Attempt to reenable this after the server switch has stabilized.
-    @Test
     @FlakyTest(message = "crbug.com/331122")
     public void testPlayMp3() throws InterruptedException, TimeoutException {
-        Tab tab = mActivityTestRule.getActivity().getActivityTab();
+        Tab tab = getActivity().getActivityTab();
         TabTitleObserver titleObserver = new TabTitleObserver(tab, "ready_to_play");
-        mActivityTestRule.loadUrl(
-                mTestServer.getURL("/chrome/test/data/android/media/audio-play.html"));
+        loadUrl(mTestServer.getURL("/chrome/test/data/android/media/audio-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");
 
         // Make sure that the audio playback "ended" and title is changed.
         titleObserver.waitForTitleUpdate(15);
-        Assert.assertEquals("ended", tab.getTitle());
+        assertEquals("ended", tab.getTitle());
+    }
+
+    @Override
+    public void startMainActivity() throws InterruptedException {
+        startMainActivityOnBlankPage();
     }
 }