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

chrome/browser/lifetime/application_lifetime.cc

 // Copyright (c) 2012 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 "chrome/browser/lifetime/application_lifetime.h"
 
 #include "ash/shell.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 77 matching lines @@
 
 void AttemptExitInternal() {
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_CLOSE_ALL_BROWSERS_REQUEST,
       content::NotificationService::AllSources(),
       content::NotificationService::NoDetails());
 
   g_browser_process->platform_part()->AttemptExit();
 }
 
+void CloseAllBrowsersAndQuit() {
+  browser_shutdown::SetTryingToQuit(true);
+  CloseAllBrowsers();
+}
+
 void CloseAllBrowsers() {
-  // If there are no browsers, send the APP_TERMINATING action here. Otherwise,
-  // it will be sent by RemoveBrowser() when the last browser has closed.
+  // If there are no browsers and closing the last browser would quit the
+  // application, send the APP_TERMINATING action here. Otherwise, it will be
+  // sent by RemoveBrowser() when the last browser has closed.
   if (browser_shutdown::ShuttingDownWithoutClosingBrowsers() ||
-      chrome::GetTotalBrowserCount() == 0) {
-    // Tell everyone that we are shutting down.
-    browser_shutdown::SetTryingToQuit(true);
+      (chrome::GetTotalBrowserCount() == 0 &&
+       (browser_shutdown::IsTryingToQuit() || !chrome::WillKeepAlive()))) {

[benwells, 2013/10/21 05:57:22]

Why did the SetTryingToQuit(true) line get removed here?

[Sam McNally, 2013/10/21 06:45:35]

Done.

[benwells, 2013/10/21 21:12:51]

Sorry, I'm probably being dense here but why don't you do it  for batch shutdown
as well? My understanding is this code path is hit if the user asks to exit,
there are no browser windows, and there is nothing else that will keep the
process alive.

In that case shouldn't TryingToQuit be set true?

 
 #if defined(ENABLE_SESSION_SERVICE)
     // If ShuttingDownWithoutClosingBrowsers() returns true, the session
     // services may not get a chance to shut down normally, so explicitly shut
     // them down here to ensure they have a chance to persist their data.
     ProfileManager::ShutdownSessionServices();
 #endif
 
     chrome::NotifyAndTerminate(true);
     chrome::OnAppExiting();
@@ skipping 50 matching lines @@
     base::debug::TraceLog::GetInstance()->SetEnabled(
         category_filter,
         base::debug::TraceLog::RECORD_UNTIL_FULL);
   }
   TRACE_EVENT0("shutdown", "StartShutdownTracing");
 }
 
 // The Android implementation is in application_lifetime_android.cc
 #if !defined(OS_ANDROID)
 void AttemptRestart() {
+  // Tell everyone that we are shutting down.
+  browser_shutdown::SetTryingToQuit(true);
+
   // TODO(beng): Can this use ProfileManager::GetLoadedProfiles instead?
   for (chrome::BrowserIterator it; !it.done(); it.Next())
     content::BrowserContext::SaveSessionState(it->profile());
 
   PrefService* pref_service = g_browser_process->local_state();
   pref_service->SetBoolean(prefs::kWasRestarted, true);
 
 #if defined(OS_CHROMEOS)
   // For CrOS instead of browser restart (which is not supported) perform a full
   // sign out. Session will be only restored if user has that setting set.
@@ skipping 11 matching lines @@
 void AttemptRestartWithModeSwitch() {
   // The kRestartSwitchMode preference does not exists for Windows 7 and older
   // operating systems so there is no need for OS version check.
   PrefService* prefs = g_browser_process->local_state();
   prefs->SetBoolean(prefs::kRestartSwitchMode, true);
   AttemptRestart();
 }
 #endif
 
 void AttemptExit() {
+  // Tell everyone that we are shutting down.
+  browser_shutdown::SetTryingToQuit(true);
+
   // If we know that all browsers can be closed without blocking,
   // don't notify users of crashes beyond this point.
   // Note that MarkAsCleanShutdown() does not set UMA's exit cleanly bit
   // so crashes during shutdown are still reported in UMA.
 #if !defined(OS_ANDROID)
   // Android doesn't use Browser.
   if (AreAllBrowsersCloseable())
     MarkAsCleanShutdown();
 #endif
   AttemptExitInternal();
 }
 
 #if defined(OS_CHROMEOS)
 // A function called when SIGTERM is received.
 void ExitCleanly() {
   // We always mark exit cleanly because SessionManager may kill
   // chrome in 3 seconds after SIGTERM.
   g_browser_process->EndSession();
 
+  // Tell everyone that we are shutting down.
+  browser_shutdown::SetTryingToQuit(true);
+
   // Don't block when SIGTERM is received. AreaAllBrowsersCloseable()
   // can be false in following cases. a) power-off b) signout from
   // screen locker.
   if (!AreAllBrowsersCloseable())
     browser_shutdown::OnShutdownStarting(browser_shutdown::END_SESSION);
   AttemptExitInternal();
 }
 #endif
 
 void SessionEnding() {
@@ skipping 144 matching lines @@
   //    environment is still active.
   if (browser->host_desktop_type() == chrome::HOST_DESKTOP_TYPE_NATIVE)
     return !ash::Shell::HasInstance();
   else if (browser->host_desktop_type() == chrome::HOST_DESKTOP_TYPE_ASH)
     return BrowserList::GetInstance(chrome::HOST_DESKTOP_TYPE_NATIVE)->empty();
 #endif
   return true;
 }
 
 }  // namespace chrome