Cleanup: Pull some browser keep alive functions into its own file.

chrome/browser/lifetime/application_lifetime.cc

Index: chrome/browser/lifetime/application_lifetime.cc
diff --git a/chrome/browser/lifetime/application_lifetime.cc b/chrome/browser/lifetime/application_lifetime.cc
index 06a90086966872e50350023e9c41475b19ea1ef8..5cb95639929f0f8b6565fafbf89deff07e58bab8 100644
--- a/chrome/browser/lifetime/application_lifetime.cc
+++ b/chrome/browser/lifetime/application_lifetime.cc
@@ -8,7 +8,6 @@
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_service.h"
 #include "base/process/process.h"
 #include "base/process/process_handle.h"
@@ -20,6 +19,7 @@
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/download/download_service.h"
 #include "chrome/browser/lifetime/browser_close_manager.h"
+#include "chrome/browser/lifetime/browser_keep_alive.h"
 #include "chrome/browser/metrics/thread_watcher.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
@@ -80,9 +80,6 @@ bool AreAllBrowsersCloseable() {
 }
 #endif  // !defined(OS_ANDROID)
 
-int g_keep_alive_count = 0;
-bool g_disable_shutdown_for_testing = false;
-
 #if defined(OS_CHROMEOS)
 // Whether chrome should send stop request to a session manager.
 bool g_send_stop_request_to_session_manager = false;
@@ -121,7 +118,8 @@ void CloseAllBrowsers() {
   // application, send the APP_TERMINATING action here. Otherwise, it will be
   // sent by RemoveBrowser() when the last browser has closed.
   if (chrome::GetTotalBrowserCount() == 0 &&
-      (browser_shutdown::IsTryingToQuit() || !chrome::WillKeepAlive())) {
+      (browser_shutdown::IsTryingToQuit() ||
+       !browser_lifetime::WillKeepAlive())) {
     // Tell everyone that we are shutting down.
     browser_shutdown::SetTryingToQuit(true);
 
@@ -294,43 +292,6 @@ void SessionEnding() {
   base::Process::Current().Terminate(0, false);
 }
 
-void IncrementKeepAliveCount() {
-  // Increment the browser process refcount as long as we're keeping the
-  // application alive.
-  if (!WillKeepAlive())
-    g_browser_process->AddRefModule();
-  ++g_keep_alive_count;
-}
-
-void CloseAllBrowsersIfNeeded() {
-  // If there are no browsers open and we aren't already shutting down,
-  // initiate a shutdown. Also skips shutdown if this is a unit test.
-  // (MessageLoop::current() == null or explicitly disabled).
-  if (chrome::GetTotalBrowserCount() == 0 &&
-      !browser_shutdown::IsTryingToQuit() && base::MessageLoop::current() &&
-      !g_disable_shutdown_for_testing) {
-    CloseAllBrowsers();
-  }
-}
-
-void DecrementKeepAliveCount() {
-  DCHECK_GT(g_keep_alive_count, 0);
-  --g_keep_alive_count;
-  // Although we should have a browser process, if there is none,
-  // there is nothing to do.
-  if (!g_browser_process) return;
-
-  // Allow the app to shutdown again.
-  if (!WillKeepAlive()) {
-    g_browser_process->ReleaseModule();
-    CloseAllBrowsersIfNeeded();
-  }
-}
-
-bool WillKeepAlive() {
-  return g_keep_alive_count > 0;
-}
-
 void NotifyAppTerminating() {
   static bool notified = false;
   if (notified)
@@ -407,10 +368,4 @@ bool ShouldStartShutdown(Browser* browser) {
   return true;
 }
 
-void DisableShutdownForTesting(bool disable_shutdown_for_testing) {
-  g_disable_shutdown_for_testing = disable_shutdown_for_testing;
-  if (!g_disable_shutdown_for_testing && !WillKeepAlive())
-    CloseAllBrowsersIfNeeded();
-}
-
 }  // namespace chrome