GRC: Added Tab coordination units behind a feature flag

services/resource_coordinator/public/cpp/resource_coordinator_features.h

Index: services/resource_coordinator/public/cpp/resource_coordinator_features.h
diff --git a/services/resource_coordinator/public/cpp/resource_coordinator_features.h b/services/resource_coordinator/public/cpp/resource_coordinator_features.h
new file mode 100644
index 0000000000000000000000000000000000000000..83fe5ba61d9b753283e04abdd72ef21830fe8bac
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+++ b/services/resource_coordinator/public/cpp/resource_coordinator_features.h
@@ -0,0 +1,23 @@
+// Copyright 2017 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.
+
+// This file defines all the public base::FeatureList features for the
+// services/resource_coordinator module.
+
+#ifndef SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_RESOURCE_COORDINATOR_FEATURES_H_
+#define SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_RESOURCE_COORDINATOR_FEATURES_H_
+
+#include "base/feature_list.h"
+#include "services/resource_coordinator/public/cpp/resource_coordinator_export.h"
+
+namespace features {
+
+// The features should be documented alongside the definition of their values
+// in the .cc file.
+extern const SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_EXPORT base::Feature
+    kGlobalResourceCoordinator;
+
+}  // namespace features
+
+#endif  // SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_RESOURCE_COORDINATOR_FEATURES_H_