Leave apps running on Windows and Linux when quitting Chrome from the wrench menu.

chrome/browser/background/background_mode_manager_unittest.cc

 // Copyright (c) 2011 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 "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/background/background_mode_manager.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/profiles/profile_info_cache.h"
@@ skipping 20 matching lines @@
 
 class TestBackgroundModeManager : public BackgroundModeManager {
  public:
   TestBackgroundModeManager(
       CommandLine* command_line, ProfileInfoCache* cache, bool enabled)
       : BackgroundModeManager(command_line, cache),
         enabled_(enabled),
         app_count_(0),
         profile_app_count_(0),
         have_status_tray_(false),
-        launch_on_startup_(false) {}
+        launch_on_startup_(false) {
+    ResumeBackgroundMode();
+  }
   virtual void EnableLaunchOnStartup(bool launch) OVERRIDE {
     launch_on_startup_ = launch;
   }
   virtual void CreateStatusTrayIcon() OVERRIDE { have_status_tray_ = true; }
   virtual void RemoveStatusTrayIcon() OVERRIDE { have_status_tray_ = false; }
   virtual int GetBackgroundAppCount() const OVERRIDE { return app_count_; }
   virtual int GetBackgroundAppCountForProfile(
       Profile* const profile) const OVERRIDE {
     return profile_app_count_;
   }
@@ skipping 25 matching lines @@
   EXPECT_TRUE(manager.IsLaunchOnStartup());
 }
 
 static void AssertBackgroundModeInactive(
     const TestBackgroundModeManager& manager) {
   EXPECT_FALSE(chrome::WillKeepAlive());
   EXPECT_FALSE(manager.HaveStatusTray());
   EXPECT_FALSE(manager.IsLaunchOnStartup());
 }
 
+static void AssertBackgroundModeSuspended(
+    const TestBackgroundModeManager& manager) {
+  EXPECT_FALSE(chrome::WillKeepAlive());
+  EXPECT_FALSE(manager.HaveStatusTray());
+  EXPECT_TRUE(manager.IsLaunchOnStartup());
+}
+
 TEST_F(BackgroundModeManagerTest, BackgroundAppLoadUnload) {
   TestingProfile* profile = profile_manager_.CreateTestingProfile("p1");
   TestBackgroundModeManager manager(
       command_line_.get(), profile_manager_.profile_info_cache(), true);
   manager.RegisterProfile(profile);
   EXPECT_FALSE(chrome::WillKeepAlive());
 
   // Mimic app load.
   manager.OnBackgroundAppInstalled(NULL);
   manager.SetBackgroundAppCount(1);
   manager.OnApplicationListChanged(profile);
   AssertBackgroundModeActive(manager);
 
+  manager.SuspendBackgroundMode();
+  AssertBackgroundModeSuspended(manager);
+  manager.ResumeBackgroundMode();
+
   // Mimic app unload.
   manager.SetBackgroundAppCount(0);
   manager.OnApplicationListChanged(profile);
   AssertBackgroundModeInactive(manager);
+
+  manager.SuspendBackgroundMode();
+  AssertBackgroundModeInactive(manager);
+
+  // Mimic app load while suspended.
+  manager.OnBackgroundAppInstalled(NULL);
+  manager.SetBackgroundAppCount(1);

[Andrew T Wilson (Slow), 2013/10/23 10:00:21]

How would an app get installed in this profile while we're suspended? Is sync
still running or something?

[Sam McNally, 2013/10/24 02:01:37]

Yes, sync is still running. I suspect newly added force-installed
extensions/apps could also trigger this.

+  manager.OnApplicationListChanged(profile);
+  AssertBackgroundModeSuspended(manager);
+
 }
 
 // App installs while background mode is disabled should do nothing.
 TEST_F(BackgroundModeManagerTest, BackgroundAppInstallUninstallWhileDisabled) {
   TestingProfile* profile = profile_manager_.CreateTestingProfile("p1");
   TestBackgroundModeManager manager(
       command_line_.get(), profile_manager_.profile_info_cache(), true);
   manager.RegisterProfile(profile);
   // Turn off background mode.
   manager.SetEnabled(false);
@@ skipping 189 matching lines @@
 
 TEST_F(BackgroundModeManagerTest,
        BackgroundModeDisabledPreventsKeepAliveOnStartup) {
   TestingProfile* profile1 = profile_manager_.CreateTestingProfile("p1");
   command_line_->AppendSwitch(switches::kKeepAliveForTest);
   TestBackgroundModeManager manager(
       command_line_.get(), profile_manager_.profile_info_cache(), false);
   manager.RegisterProfile(profile1);
   EXPECT_FALSE(manager.ShouldBeInBackgroundMode());
 }