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

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 2039ce8b3420c8ffb0531121d9b3b887d36ffd67..4d9c3b280cf757355ecb9fa56c68b83d2570d763 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1347,6 +1347,11 @@ const char kIpcFuzzerTestcase[]             = "ipc-fuzzer-testcase";
 const char kDebugPrint[] = "debug-print";
 #endif
 
+#if defined(ENABLE_TASK_MANAGER)
+// Enables the new implementation of the task manager.
+const char kEnableNewTaskManager[]   = "enable-new-task-manager";
+#endif  // defined(ENABLE_TASK_MANAGER)
+
 bool AboutInSettingsEnabled() {
   return SettingsWindowEnabled() &&
          !base::CommandLine::ForCurrentProcess()->HasSwitch(
@@ -1396,6 +1401,13 @@ bool PowerOverlayEnabled() {
 }
 #endif
 
+#if defined(ENABLE_TASK_MANAGER)
+bool NewTaskManagerEnabled() {
+  return base::CommandLine::ForCurrentProcess()->HasSwitch(
+      kEnableNewTaskManager);
+}
+#endif  // defined(ENABLE_TASK_MANAGER)
+
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR CRAP TO THE BOTTOM OF THIS FILE.
 //