Convert WebappActivityTestBase and direct children to JUnit4.

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

 // Copyright 2015 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.content.Intent;
 import android.graphics.Color;
 import android.graphics.drawable.ColorDrawable;
 import android.support.test.filters.SmallTest;
 import android.view.ViewGroup;
 
+import org.junit.Assert;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import org.chromium.base.metrics.RecordHistogram;
+import org.chromium.base.test.util.CommandLineFlags;
 import org.chromium.base.test.util.Feature;
+import org.chromium.chrome.browser.ChromeSwitches;
 import org.chromium.chrome.browser.ShortcutHelper;
 import org.chromium.chrome.browser.metrics.WebappUma;
+import org.chromium.chrome.test.ChromeActivityTestRule;
+import org.chromium.chrome.test.ChromeJUnit4ClassRunner;
 
 /**
  * Tests for splash screens with EXTRA_BACKGROND_COLOR specified in the Intent.
  */
-public class WebappSplashScreenBackgroundColorTest extends WebappActivityTestBase {
-    @Override
-    protected Intent createIntent() {
-        Intent intent = super.createIntent();
+@RunWith(ChromeJUnit4ClassRunner.class)
+@CommandLineFlags.Add({ChromeSwitches.DISABLE_FIRST_RUN_EXPERIENCE,
+        ChromeActivityTestRule.DISABLE_NETWORK_PREDICTION_FLAG})
+public class WebappSplashScreenBackgroundColorTest {
+    @Rule
+    public final WebappActivityTestRule mActivityTestRule = new WebappActivityTestRule();
+
+    private Intent createIntent() {
+        Intent intent = mActivityTestRule.createIntent();
         // This is setting Color.GREEN with 50% opacity.
         intent.putExtra(ShortcutHelper.EXTRA_BACKGROUND_COLOR, 0x8000FF00L);
         return intent;
     }
 
+    @Test
     @SmallTest
     @Feature({"Webapps"})
     public void testShowBackgroundColorAndRecordUma() throws Exception {
-        startWebappActivity();
+        mActivityTestRule.startWebappActivity(createIntent());
 
-        ViewGroup splashScreen = waitUntilSplashScreenAppears();
+        ViewGroup splashScreen = mActivityTestRule.waitUntilSplashScreenAppears();
         ColorDrawable background = (ColorDrawable) splashScreen.getBackground();
 
-        assertEquals(Color.GREEN, background.getColor());
+        Assert.assertEquals(Color.GREEN, background.getColor());
 
-        assertEquals(1, RecordHistogram.getHistogramValueCountForTesting(
-                WebappUma.HISTOGRAM_SPLASHSCREEN_BACKGROUNDCOLOR,
-                WebappUma.SPLASHSCREEN_COLOR_STATUS_CUSTOM));
+        Assert.assertEquals(1,
+                RecordHistogram.getHistogramValueCountForTesting(
+                        WebappUma.HISTOGRAM_SPLASHSCREEN_BACKGROUNDCOLOR,
+                        WebappUma.SPLASHSCREEN_COLOR_STATUS_CUSTOM));
     }
 }