[wip] implement command usecases

src/background/presenters/console.js

@@ -0,0 +1,16 @@
+import messages from '../../shared/messages';
+
+export default class ConsolePresenter {
+  showInfo(tabId, message) {
+    return browser.tabs.sendMessage(tabId, {
+      type: messages.CONSOLE_SHOW_INFO,
+      text: message,
+    });
+  }
+  showError(tabId, message) {
+    return browser.tabs.sendMessage(tabId, {
+      type: messages.CONSOLE_SHOW_ERROR,
+      text: message,
+    });
+  }
+}