Move memory_coordinator_client and its registry to base/memory

components/memory_coordinator/common/memory_coordinator_client.h

Index: components/memory_coordinator/common/memory_coordinator_client.h
diff --git a/components/memory_coordinator/common/memory_coordinator_client.h b/components/memory_coordinator/common/memory_coordinator_client.h
deleted file mode 100644
index 269d72f59459f549f15ea21917c50d545ac438b2..0000000000000000000000000000000000000000
--- a/components/memory_coordinator/common/memory_coordinator_client.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// 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 MEMORY_COORDINATOR_COMMON_MEMORY_COORDINATOR_CLIENT_H_
-#define MEMORY_COORDINATOR_COMMON_MEMORY_COORDINATOR_CLIENT_H_
-
-#include "components/memory_coordinator/public/interfaces/child_memory_coordinator.mojom.h"
-
-namespace memory_coordinator {
-
-using MemoryState = mojom::MemoryState;
-
-// This is an interface for components which can respond to memory status
-// changes.
-class MemoryCoordinatorClient {
- public:
-  virtual ~MemoryCoordinatorClient() {}
-
-  // Called when memory state has changed.
-  virtual void OnMemoryStateChange(MemoryState state) = 0;
-};
-
-}  // namespace memory_coordinator
-
-#endif  // MEMORY_COORDINATOR_COMMON_MEMORY_COORDINATOR_CLIENT_H_