Correctly hide the content suggestions menu item by default.

Setting android:visible="false" only seems to work on groups,
not individual items.

Review-Url: https://codereview.chromium.org/2621203004
Cr-Commit-Position: refs/heads/master@{#442950}

chrome/android/java/res/menu/main_menu.xml

@@ -71,8 +71,7 @@
         <item android:id="@+id/enter_vr_id"
             android:title="@string/enter_vr" />
         <item android:id="@+id/content_suggestions_standalone_ui"
-            android:title="@null"
-            android:visible="false" />
+            android:title="@null" />
     </group>
 
     <!-- Items shown only in the tab switcher -->

chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenuPropertiesDelegate.java

@@ -192,11 +192,10 @@ public class AppMenuPropertiesDelegate {
 
             // Only display the standalone content suggestions UI if the corresponding feature
             // is enabled.
-            if (ChromeFeatureList.isEnabled(ChromeFeatureList.NTP_SUGGESTIONS_STANDALONE_UI)) {
-                MenuItem item = menu.findItem(R.id.content_suggestions_standalone_ui);
-                item.setTitle("🔰🆕👌");
-                item.setVisible(true);
-            }
+            MenuItem item = menu.findItem(R.id.content_suggestions_standalone_ui);
+            item.setTitle("🔰🆕👌");
+            item.setVisible(
+                    ChromeFeatureList.isEnabled(ChromeFeatureList.NTP_SUGGESTIONS_STANDALONE_UI));
         }
 
         if (isOverviewMenu) {