Remove NOTIFICATION_EXTENSION_ENABLED.

chrome/browser/apps/app_browsertest.cc

 // Copyright 2013 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.
 
 #include <stddef.h>
 
 #include <memory>
 
 #include "apps/launcher.h"
 #include "base/auto_reset.h"
@@ skipping 919 matching lines @@
 
 // Tests that an app calling chrome.runtime.reload will reload the app and
 // relaunch it if it was running.
 IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest, ReloadRelaunches) {
   ExtensionTestMessageListener launched_listener("Launched", true);
   const Extension* extension =
       LoadAndLaunchPlatformApp("reload", &launched_listener);
   ASSERT_TRUE(extension);
   ASSERT_TRUE(GetFirstAppWindow());
 
-  // Now tell the app to reload itself
+  // Now tell the app to reload itself.
   ExtensionTestMessageListener launched_listener2("Launched", false);
   launched_listener.Reply("reload");
   ASSERT_TRUE(launched_listener2.WaitUntilSatisfied());
   ASSERT_TRUE(GetFirstAppWindow());
 }
 
+// Tests that reloading a component app loads its (lazy) background page.
+IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest,
+                       ComponentReloadLoadsLazyBackgroundPage) {
+  ExtensionTestMessageListener launched_listener("Launched", true);
+  const Extension* component_app = LoadExtensionAsComponentWithManifest(
+      test_data_dir_.AppendASCII("platform_apps")
+          .AppendASCII("component_reload"),
+      FILE_PATH_LITERAL("manifest.json"));
+  ASSERT_TRUE(component_app);
+  ASSERT_TRUE(launched_listener.WaitUntilSatisfied());
+
+  // Now tell the app to reload itself.
+  ExtensionTestMessageListener launched_listener2("Launched", false);
+  launched_listener.Reply("reload");
+  ASSERT_TRUE(launched_listener2.WaitUntilSatisfied());
+}
+
 namespace {
 
 // Utility class to ensure extension installation does or does not occur in
 // certain scenarios.
 class CheckExtensionInstalledObserver
     : public extensions::ExtensionRegistryObserver {
  public:
   explicit CheckExtensionInstalledObserver(Profile* profile)
       : seen_(false), registry_(extensions::ExtensionRegistry::Get(profile)) {
     registry_->AddObserver(this);
@@ skipping 408 matching lines @@
 }
 
 // Sends chrome.test.sendMessage from chrome.app.window.create's callback.
 // The app window also adds an <iframe> to the page during window.onload.
 IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest, AppWindowIframe) {
   LoadAndLaunchPlatformApp("app_window_send_message",
                            "APP_WINDOW_CREATE_CALLBACK");
 }
 
 }  // namespace extensions