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

chrome/browser/ui/app_list/app_list_service_views_browsertest.cc

Index: chrome/browser/ui/app_list/app_list_service_views_browsertest.cc
diff --git a/chrome/browser/ui/app_list/app_list_service_views_browsertest.cc b/chrome/browser/ui/app_list/app_list_service_views_browsertest.cc
index 0a6485c4a60a45129c01e559f9605ffa6f6be695..672b59c0c1283e14b7cd6af82e7c13ac1e4b5611 100644
--- a/chrome/browser/ui/app_list/app_list_service_views_browsertest.cc
+++ b/chrome/browser/ui/app_list/app_list_service_views_browsertest.cc
@@ -8,6 +8,7 @@
 #include "base/run_loop.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
+#include "chrome/browser/lifetime/browser_keep_alive.h"
 #include "chrome/browser/ui/app_list/app_list_controller_delegate.h"
 #include "chrome/browser/ui/app_list/test/chrome_app_list_test_support.h"
 #include "chrome/browser/ui/browser.h"
@@ -117,13 +118,13 @@ IN_PROC_BROWSER_TEST_F(AppListServiceViewsBrowserTest, MAYBE_AcceleratorClose) {
   generator.PressKey(ui::VKEY_ESCAPE, 0);
 
 #if !defined(OS_CHROMEOS)
-  EXPECT_TRUE(chrome::WillKeepAlive());
+  EXPECT_TRUE(browser_lifetime::WillKeepAlive());
 #endif
 
   base::RunLoop().RunUntilIdle();
 
 #if !defined(OS_CHROMEOS)
-  EXPECT_FALSE(chrome::WillKeepAlive());
+  EXPECT_FALSE(browser_lifetime::WillKeepAlive());
 #endif
   EXPECT_FALSE(service->GetAppListWindow());
 }