Phase 3: Implement New Task Manager Flag in about:flags.

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index c124c8e24953a19bb11767c3a2d839cdbdbfa95f..30bf05714713cb50d5083ed05666dddf9b901480 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2059,6 +2059,12 @@ const Experiment kExperiments[] = {
      kOsAll,
      SINGLE_VALUE_TYPE(switches::kEnableClearBrowsingDataCounters)
     },
+    {"enable-new-task-manager",
+     IDS_FLAGS_ENABLE_NEW_TASK_MANAGER_NAME,
+     IDS_FLAGS_ENABLE_NEW_TASK_MANAGER_DESCRIPTION,
+     kOsDesktop,
+     SINGLE_VALUE_TYPE(switches::kEnableNewTaskManager)
+    },
     // NOTE: Adding new command-line switches requires adding corresponding
     // entries to enum "LoginCustomFlags" in histograms.xml. See note in
     // histograms.xml and don't forget to run AboutFlagsHistogramTest unit test.