public Builder setCustomItems(BrowserActionItem... items) {
            return setCustomItems(new ArrayList<BrowserActionItem>(Arrays.asList(items)));
        }
Sets the custom items list.
Only maximum MAX_CUSTOM_ITEMS custom items are allowed,
otherwise throws an {@link IllegalStateException}.
@param items The varargs of {@link BrowserActionItem} for custom items.
customtabs/src/android/support/customtabs/browseractions/BrowserActionsIntent.java