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

chrome/browser/ui/views/auto_keep_alive.cc

Index: chrome/browser/ui/views/auto_keep_alive.cc
diff --git a/chrome/browser/ui/views/auto_keep_alive.cc b/chrome/browser/ui/views/auto_keep_alive.cc
index c7128e983f42d2d346c655574c26f50c22fbd385..546b3aef81f223866a046fb99e237f9995884ecb 100644
--- a/chrome/browser/ui/views/auto_keep_alive.cc
+++ b/chrome/browser/ui/views/auto_keep_alive.cc
@@ -4,7 +4,7 @@
 
 #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)
@@ -17,11 +17,11 @@ AutoKeepAlive::AutoKeepAlive(gfx::NativeWindow 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();
 }