Reland: Add MemoryCoordinator

components/memory_coordinator/common/memory_coordinator_features.h

Index: components/memory_coordinator/common/memory_coordinator_features.h
diff --git a/components/memory_coordinator/common/memory_coordinator_features.h b/components/memory_coordinator/common/memory_coordinator_features.h
new file mode 100644
index 0000000000000000000000000000000000000000..8b0518ab360e3174eff8874ae6d049744adb4ec5
--- /dev/null
+++ b/components/memory_coordinator/common/memory_coordinator_features.h
@@ -0,0 +1,24 @@
+// Copyright 2016 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 COMPONENTS_MEMORY_COORDINATOR_COMMON_MEMORY_COORDINATOR_FEATURES_H_
+#define COMPONENTS_MEMORY_COORDINATOR_COMMON_MEMORY_COORDINATOR_FEATURES_H_
+
+#include "base/feature_list.h"
+
+// WARNING:
+// The memory coordinator is not ready for use and enabling this may cause
+// unexpected memory regression at this point. Please do not enable this.
+
+namespace memory_coordinator {
+
+// Returns true when the memory coordinator is enabled.
+bool IsEnabled();
+
+// Enables the memory coordinator for testing.
+void EnableForTesting();
+
+}  // memory_coordinator
+
+#endif  // COMPONENTS_MEMORY_COORDINATOR_COMMON_MEMORY_COORDINATOR_FEATURES_H_