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

chrome/browser/ui/ash/launcher/chrome_launcher_controller_unittest.cc

Index: chrome/browser/ui/ash/launcher/chrome_launcher_controller_unittest.cc
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_controller_unittest.cc b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_unittest.cc
index e10c9529c892ccb14df294e9848f83d62100a350..f2473eec3666d2ef6884b78386417baf70b9082b 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_controller_unittest.cc
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_unittest.cc
@@ -49,10 +49,10 @@
 #if defined(OS_CHROMEOS)
 #include "ash/test/test_session_state_delegate.h"
 #include "ash/test/test_shell_delegate.h"
-#include "chrome/browser/apps/scoped_keep_alive.h"
 #include "chrome/browser/chromeos/login/users/fake_chrome_user_manager.h"
 #include "chrome/browser/chromeos/login/users/scoped_user_manager_enabler.h"
 #include "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.h"
+#include "chrome/browser/lifetime/browser_keep_alive.h"
 #include "chrome/browser/ui/apps/chrome_app_delegate.h"
 #include "chrome/browser/ui/ash/launcher/app_window_launcher_controller.h"
 #include "chrome/browser/ui/ash/launcher/browser_status_monitor.h"
@@ -728,8 +728,8 @@ class V2App {
  public:
   V2App(Profile* profile, const extensions::Extension* extension) {
     window_ = new extensions::AppWindow(
-        profile,
-        new ChromeAppDelegate(make_scoped_ptr(new ScopedKeepAlive)),
+        profile, new ChromeAppDelegate(
+                     make_scoped_ptr(new browser_lifetime::ScopedKeepAlive)),
         extension);
     extensions::AppWindow::CreateParams params =
         extensions::AppWindow::CreateParams();