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

chrome/browser/task_manager/task_manager_browsertest_util.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_BROWSERTEST_UTIL_H_
 #define CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_BROWSERTEST_UTIL_H_
 
 #include "base/strings/string16.h"
 
 namespace task_manager {
 namespace browsertest_util {
 
+// For the old task manager browser tests, we must call this to disable the
+// use of the new implementation and revert back to the old one.
+void EnableOldTaskManager();
+
 // Runs the message loop, observing the task manager, until there are exactly
 // |resource_count| many resources whose titles match the pattern
 // |title_pattern|. The match is done via string_util's base::MatchPattern, so
 // |title_pattern| may contain wildcards like "*".
 //
 // If the wait times out, this test will trigger a gtest failure. To get
 // meaningful errors, tests should wrap invocations of this function with
 // ASSERT_NO_FATAL_FAILURE().
 void WaitForTaskManagerRows(int resource_count,
                             const base::string16& title_pattern);
@@ skipping 36 matching lines @@
 base::string16 MatchSubframe(const char* title);    // "Subframe: " + title
 base::string16 MatchAnySubframe();                  // "Subframe: *"
 // "Utility: " + title
 base::string16 MatchUtility(const base::string16& title);
 base::string16 MatchAnyUtility();                   // "Utility: *"
 
 }  // namespace browsertest_util
 }  // namespace task_manager
 
 #endif  // CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_BROWSERTEST_UTIL_H_