Refactor shutdown code to allow win/linux to run after last browser closes.

chrome/browser/browser.cc

 // Copyright (c) 2010 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/browser.h"
 
 #if defined(OS_WIN)
 #include <shellapi.h>
 #include <windows.h>
 #endif  // OS_WIN
@@ skipping 790 matching lines @@
   ProcessPendingTabs();
   return false;
 }
 
 void Browser::OnWindowClosing() {
   if (!ShouldCloseWindow())
     return;
 
   bool exiting = false;
 
-#if defined(OS_MACOSX)
-  // On Mac, closing the last window isn't usually a sign that the app is
-  // shutting down.
-  bool should_quit_if_last_browser = browser_shutdown::IsTryingToQuit();
-#else
-  bool should_quit_if_last_browser = true;
-#endif
+  // Application should shutdown on last window close if the user is explicitly
+  // trying to quit, or if there is nothing keeping the browser alive (such as
+  // AppController on the Mac, or BackgroundContentsService for background
+  // pages).
+  bool should_quit_if_last_browser =
+      browser_shutdown::IsTryingToQuit() || !BrowserList::WillKeepAlive();
 
   if (should_quit_if_last_browser && BrowserList::size() == 1) {
     browser_shutdown::OnShutdownStarting(browser_shutdown::WINDOW_CLOSE);
     exiting = true;
   }
 
   // Don't use HasSessionService here, we want to force creation of the
   // session service so that user can restore what was open.
   SessionService* session_service = profile()->GetSessionService();
   if (session_service)
@@ skipping 3209 matching lines @@
 }
 
 bool Browser::IsPinned(TabContents* source) {
   int index = tabstrip_model_.GetIndexOfTabContents(source);
   if (index == TabStripModel::kNoTab) {
     NOTREACHED() << "IsPinned called for tab not in our strip";
     return false;
   }
   return tabstrip_model_.IsTabPinned(index);
 }