Fix dark mode by adding missing background color

Also add render test.

Bug: 1146983
Change-Id: I3c411741e9043ff780708bed3a49e07b4a197453
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2526443
Auto-Submit: Christian Dullweber <dullweber@chromium.org>
Commit-Queue: Ehimare Okoyomon <eokoyomon@chromium.org>
Reviewed-by: Ehimare Okoyomon <eokoyomon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825411}

chrome/android/javatests/src/org/chromium/chrome/browser/page_info/PageInfoViewTest.java

@@ -18,6 +18,7 @@ import static org.hamcrest.CoreMatchers.containsString;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 
+import static org.chromium.chrome.browser.preferences.ChromePreferenceKeys.UI_THEME_SETTING;
 import static org.chromium.chrome.test.util.ViewUtils.onViewWaiting;
 import static org.chromium.components.content_settings.PrefNames.COOKIE_CONTROLS_MODE;
 
@@ -38,7 +39,9 @@ import org.chromium.base.test.util.DisabledTest;
 import org.chromium.base.test.util.Feature;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.flags.ChromeSwitches;
+import org.chromium.chrome.browser.night_mode.ThemeType;
 import org.chromium.chrome.browser.notifications.channels.SiteChannelsManager;
+import org.chromium.chrome.browser.preferences.SharedPreferencesManager;
 import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.chrome.test.ChromeJUnit4ClassRunner;
 import org.chromium.chrome.test.ChromeTabbedActivityTestRule;
@@ -305,6 +308,22 @@ public class PageInfoViewTest {
         mRenderTestRule.render(getPageInfoView(), "PageInfo_SecureWebsiteV2");
     }
 
+    /**
+     * Tests the new PageInfo UI on a secure website in dark mode.
+     */
+    @Test
+    @MediumTest
+    @Feature({"RenderTest"})
+    @Features.EnableFeatures(PageInfoFeatureList.PAGE_INFO_V2)
+    public void testShowOnSecureWebsiteDarkV2() throws IOException {
+        TestThreadUtils.runOnUiThreadBlocking(() -> {
+            SharedPreferencesManager.getInstance().writeInt(UI_THEME_SETTING, ThemeType.DARK);
+        });
+        mActivityTestRule.startMainActivityOnBlankPage();
+        loadUrlAndOpenPageInfo(mTestServerRule.getServer().getURL(sSimpleHtml));
+        mRenderTestRule.render(getPageInfoView(), "PageInfo_SecureWebsiteDarkV2");
+    }
+
     /**
      * Tests the connection info page of the new PageInfo UI.
      */

components/page_info/android/java/res/layout/page_info_v2.xml

@@ -10,6 +10,7 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:background="@color/sheet_bg_color"
     android:orientation="vertical">
 
     <LinearLayout