Revert of discardable_memory: Using mojo IPC to replace Chrome IPC

components/discardable_memory/public/interfaces/discardable_shared_memory_manager.mojom

Index: components/discardable_memory/public/interfaces/discardable_shared_memory_manager.mojom
diff --git a/components/discardable_memory/public/interfaces/discardable_shared_memory_manager.mojom b/components/discardable_memory/public/interfaces/discardable_shared_memory_manager.mojom
deleted file mode 100644
index 2685be1cd57cdec954c5de484a7b6e12f3c93d21..0000000000000000000000000000000000000000
--- a/components/discardable_memory/public/interfaces/discardable_shared_memory_manager.mojom
+++ /dev/null
@@ -1,16 +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.
-
-module discardable_memory.mojom;
-
-// This interface is used for allocating discardable shared memory from browser
-// process. For mus+ash, this service will live in mus process.
-interface DiscardableSharedMemoryManager {
-  // Allocate a locked discardable shared memory segment.
-  AllocateLockedDiscardableSharedMemory(
-      uint32 size,
-      int32 id) => (handle<shared_buffer> memory);
-  // Notify manager that a memory segment has been deleted.
-  DeletedDiscardableSharedMemory(int32 id);
-};