Change the new-task-manager flag so that the new implementation is enabled by default for all users.

chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc

Index: chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc b/chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc
index a72c0538f3b38ff61633842e3a64066c7a89e922..b4cee6a888217d282bf4cb9a3f2625ee57b1aa9d 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc
+++ b/chrome/browser/ui/webui/print_preview/print_preview_ui_browsertest.cc
@@ -90,6 +90,10 @@ IN_PROC_BROWSER_TEST_F(PrintPreviewTest, PrintCommands) {
 #define MAYBE_TaskManagerNewPrintPreview TaskManagerNewPrintPreview
 #endif
 IN_PROC_BROWSER_TEST_F(PrintPreviewTest, MAYBE_TaskManagerNewPrintPreview) {
+  // 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());  // Show task manager BEFORE print dialog.
 
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAboutBlankTab()));
@@ -109,6 +113,10 @@ IN_PROC_BROWSER_TEST_F(PrintPreviewTest, MAYBE_TaskManagerNewPrintPreview) {
 // http://crbug/367665.
 IN_PROC_BROWSER_TEST_F(PrintPreviewTest,
                        DISABLED_TaskManagerExistingPrintPreview) {
+  // This test is for the old implementation of the task manager. We must
+  // explicitly disable the new one.
+  task_manager::browsertest_util::EnableOldTaskManager();
+
   // Create the print preview dialog.
   Print();