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

chrome/browser/ui/views/auto_keep_alive.cc

 // Copyright 2014 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/ui/views/auto_keep_alive.h"
 
-#include "chrome/browser/lifetime/application_lifetime.h"
+#include "chrome/browser/lifetime/browser_keep_alive.h"
 #include "chrome/browser/ui/host_desktop.h"
 
 AutoKeepAlive::AutoKeepAlive(gfx::NativeWindow window)
     : keep_alive_available_(false) {
   // In case of aura we want default to be keep alive not available for ash
   // because ash has keep alive set and we don't want additional keep alive
   // count.
   chrome::HostDesktopType desktop_type =
       window ? chrome::GetHostDesktopTypeForNativeWindow(window)
              : chrome::GetActiveDesktop();
   if (desktop_type != chrome::HOST_DESKTOP_TYPE_ASH) {
     keep_alive_available_ = true;
-    chrome::IncrementKeepAliveCount();
+    browser_lifetime::IncrementKeepAliveCount();
   }
 }
 
 AutoKeepAlive::~AutoKeepAlive() {
   if (keep_alive_available_)
-    chrome::DecrementKeepAliveCount();
+    browser_lifetime::DecrementKeepAliveCount();
 }