Remove the old task manager view

chrome/browser/extensions/app_background_page_apitest.cc

Index: chrome/browser/extensions/app_background_page_apitest.cc
diff --git a/chrome/browser/extensions/app_background_page_apitest.cc b/chrome/browser/extensions/app_background_page_apitest.cc
index b79b4d4cc6f3eb445d7c660a7244dd307a911b0d..a5a678ebc5c692e2d7a5b2b118a7be10ecdfcef7 100644
--- a/chrome/browser/extensions/app_background_page_apitest.cc
+++ b/chrome/browser/extensions/app_background_page_apitest.cc
@@ -16,7 +16,6 @@
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/task_manager/task_manager_browsertest_util.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/browser_window.h"
@@ -308,9 +307,6 @@ IN_PROC_BROWSER_TEST_F(AppBackgroundPageApiTest, NoJsBackgroundPage) {
   // Keep the task manager up through this test to verify that a crash doesn't
   // happen when window.open creates a background page that switches
   // RenderViewHosts. See http://crbug.com/165138.
-  // This test is for the old implementation of the task manager. We must
-  // explicitly disable the new one.
-  task_manager::browsertest_util::EnableOldTaskManager();
   chrome::ShowTaskManager(browser());
 
   // Make sure that no BackgroundContentses get deleted (a signal that repeated