Convert ChromeActivityTestCaseBase direct children to JUnit4

chrome/android/javatests/src/org/chromium/chrome/browser/tab/SadTabTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/tab/SadTabTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/tab/SadTabTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/tab/SadTabTest.java
index 23ca61c4264e28a4433f1e4a16a2535dcc939d99..c0857975e15a6125b7b9d1f6bcbaedc1926be5b4 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/tab/SadTabTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/tab/SadTabTest.java
@@ -7,53 +7,66 @@ package org.chromium.chrome.browser.tab;
 import android.support.test.filters.SmallTest;
 import android.widget.Button;
 
+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.ThreadUtils;
+import org.chromium.base.test.util.CommandLineFlags;
 import org.chromium.base.test.util.Feature;
 import org.chromium.base.test.util.RetryOnFailure;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ChromeActivity;
-import org.chromium.chrome.test.ChromeActivityTestCaseBase;
+import org.chromium.chrome.browser.ChromeSwitches;
+import org.chromium.chrome.test.ChromeActivityTestRule;
+import org.chromium.chrome.test.ChromeJUnit4ClassRunner;
 
 /**
  * Tests related to the sad tab logic.
  */
+@RunWith(ChromeJUnit4ClassRunner.class)
 @RetryOnFailure
-public class SadTabTest extends ChromeActivityTestCaseBase<ChromeActivity> {
-
-    public SadTabTest() {
-        super(ChromeActivity.class);
-    }
-
-    @Override
-    public void startMainActivity() throws InterruptedException {
-        startMainActivityOnBlankPage();
+@CommandLineFlags.Add({ChromeSwitches.DISABLE_FIRST_RUN_EXPERIENCE,
+        ChromeActivityTestRule.DISABLE_NETWORK_PREDICTION_FLAG})
+public class SadTabTest {
+    @Rule
+    public ChromeActivityTestRule<ChromeActivity> mActivityTestRule =
+            new ChromeActivityTestRule<>(ChromeActivity.class);
+
+    @Before
+    public void setUp() throws InterruptedException {
+        mActivityTestRule.startMainActivityOnBlankPage();
     }
 
     /**
      * Verify that the sad tab is shown when the renderer crashes.
      */
+    @Test
     @SmallTest
     @Feature({"SadTab"})
     public void testSadTabShownWhenRendererProcessKilled() {
-        final Tab tab = getActivity().getActivityTab();
+        final Tab tab = mActivityTestRule.getActivity().getActivityTab();
 
-        assertFalse(tab.isShowingSadTab());
+        Assert.assertFalse(tab.isShowingSadTab());
         simulateRendererKilled(tab, true);
-        assertTrue(tab.isShowingSadTab());
+        Assert.assertTrue(tab.isShowingSadTab());
     }
 
     /**
      * Verify that the sad tab is not shown when the renderer crashes in the background or the
      * renderer was killed by the OS out-of-memory killer.
      */
+    @Test
     @SmallTest
     @Feature({"SadTab"})
     public void testSadTabNotShownWhenRendererProcessKilledInBackround() {
-        final Tab tab = getActivity().getActivityTab();
+        final Tab tab = mActivityTestRule.getActivity().getActivityTab();
 
-        assertFalse(tab.isShowingSadTab());
+        Assert.assertFalse(tab.isShowingSadTab());
         simulateRendererKilled(tab, false);
-        assertFalse(tab.isShowingSadTab());
+        Assert.assertFalse(tab.isShowingSadTab());
     }
 
     /**
@@ -63,32 +76,39 @@ public class SadTabTest extends ChromeActivityTestCaseBase<ChromeActivity> {
      * @throws InterruptedException
      * @throws IllegalArgumentException
      */
+    @Test
     @SmallTest
     @Feature({"SadTab"})
     public void testSadTabPageButtonText() throws IllegalArgumentException, InterruptedException {
-        final Tab tab = getActivity().getActivityTab();
+        final Tab tab = mActivityTestRule.getActivity().getActivityTab();
 
-        assertFalse(tab.isShowingSadTab());
+        Assert.assertFalse(tab.isShowingSadTab());
         simulateRendererKilled(tab, true);
-        assertTrue(tab.isShowingSadTab());
+        Assert.assertTrue(tab.isShowingSadTab());
         String actualText = getSadTabButton(tab).getText().toString();
-        assertEquals("Expected the sad tab button to have the reload label",
-                getActivity().getString(R.string.sad_tab_reload_label), actualText);
+        Assert.assertEquals("Expected the sad tab button to have the reload label",
+                mActivityTestRule.getActivity().getString(R.string.sad_tab_reload_label),
+                actualText);
 
         reloadSadTab(tab);
-        assertTrue(tab.isShowingSadTab());
+        Assert.assertTrue(tab.isShowingSadTab());
         actualText = getSadTabButton(tab).getText().toString();
-        assertEquals(
+        Assert.assertEquals(
                 "Expected the sad tab button to have the feedback label after the tab button "
-                + "crashes twice in a row.",
-                getActivity().getString(R.string.sad_tab_send_feedback_label), actualText);
-        loadUrl("about:blank");
-        assertFalse("Expected about:blank to destroy the sad tab however the sad tab is still in "
-                + "view", tab.isShowingSadTab());
+                        + "crashes twice in a row.",
+                mActivityTestRule.getActivity().getString(R.string.sad_tab_send_feedback_label),
+                actualText);
+        mActivityTestRule.loadUrl("about:blank");
+        Assert.assertFalse(
+                "Expected about:blank to destroy the sad tab however the sad tab is still in "
+                        + "view",
+                tab.isShowingSadTab());
         simulateRendererKilled(tab, true);
         actualText = getSadTabButton(tab).getText().toString();
-        assertEquals("Expected the sad tab button to have the reload label after a successful load",
-                getActivity().getString(R.string.sad_tab_reload_label), actualText);
+        Assert.assertEquals(
+                "Expected the sad tab button to have the reload label after a successful load",
+                mActivityTestRule.getActivity().getString(R.string.sad_tab_reload_label),
+                actualText);
     }
 
     /**