Don't add keep-alives for apps after the app keep-alive service has shut down.

apps/app_keep_alive_service_unittest.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 "apps/app_keep_alive_service.h"
 #include "apps/app_keep_alive_service_factory.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/test/base/testing_profile.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 60 matching lines @@
   service_->OnAppStart(&profile_, "foo");
   EXPECT_TRUE(chrome::WillKeepAlive());
   service_->OnAppStart(&profile_, "foo");
   EXPECT_TRUE(chrome::WillKeepAlive());
   service_->OnAppStop(&profile_, "foo");
   EXPECT_FALSE(chrome::WillKeepAlive());
   service_->Shutdown();
   EXPECT_FALSE(chrome::WillKeepAlive());
 }
 
+// Test that OnAppStart is ignored after the service has been shut down.
+TEST_F(AppKeepAliveServiceUnitTest, StartAfterShutdown) {
+  ASSERT_FALSE(chrome::WillKeepAlive());
+  service_->Shutdown();
+  service_->OnAppStart(&profile_, "foo");
+  EXPECT_FALSE(chrome::WillKeepAlive());
+}
+
 TEST_F(AppKeepAliveServiceUnitTest, MultipleApps) {
   ASSERT_FALSE(chrome::WillKeepAlive());
   service_->OnAppStart(&profile_, "foo");
   EXPECT_TRUE(chrome::WillKeepAlive());
   service_->OnAppStart(&profile_, "bar");
   EXPECT_TRUE(chrome::WillKeepAlive());
   service_->OnAppStop(&profile_, "foo");
   EXPECT_TRUE(chrome::WillKeepAlive());
   service_->OnAppStop(&profile_, "bar");
   EXPECT_FALSE(chrome::WillKeepAlive());
@@ skipping 21 matching lines @@
 TEST_F(AppKeepAliveServiceUnitTest, ProfileShutdownWithAppsStarted) {
   ASSERT_FALSE(chrome::WillKeepAlive());
   service_->OnAppStart(&profile_, "foo");
   EXPECT_TRUE(chrome::WillKeepAlive());
   service_->OnAppStart(&profile_, "bar");
   EXPECT_TRUE(chrome::WillKeepAlive());
   service_->Shutdown();
   EXPECT_FALSE(chrome::WillKeepAlive());
 }
 #endif