Adds a flag to support "Virtual Time" to the blink scheduler

components/scheduler/common/scheduler_switches.cc

Index: components/scheduler/common/scheduler_switches.cc
diff --git a/components/scheduler/common/scheduler_switches.cc b/components/scheduler/common/scheduler_switches.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8ea8fe90d86b468daf388022a0706844d4b9b296
--- /dev/null
+++ b/components/scheduler/common/scheduler_switches.cc
@@ -0,0 +1,16 @@
+// Copyright 2015 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.
+
+#include "components/scheduler/common/scheduler_switches.h"
+
+namespace scheduler {
+namespace switches {
+
+// Enable Virtualized time where the render thread's time source skips forward
+// to the next scheduled delayed time if there is no more non-delayed work to be
+// done.
+const char kEnableVirtualizedTime[] = "enable-virtualized-time";
+
+}  // namespace switches
+}  // namespace scheduler