Revert of Architecture for cross-process memory notification suppressing

content/child/memory/child_memory_message_filter.h

Index: content/child/memory/child_memory_message_filter.h
diff --git a/content/child/memory/child_memory_message_filter.h b/content/child/memory/child_memory_message_filter.h
deleted file mode 100644
index 32e2a2a1ea0ae16240b086711ae6c75c24ee9723..0000000000000000000000000000000000000000
--- a/content/child/memory/child_memory_message_filter.h
+++ /dev/null
@@ -1,32 +0,0 @@
-// 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.
-
-#ifndef CONTENT_CHILD_MEMORY_CHILD_MEMORY_MESSAGE_FILTER_H_
-#define CONTENT_CHILD_MEMORY_CHILD_MEMORY_MESSAGE_FILTER_H_
-
-#include "ipc/message_filter.h"
-
-namespace content {
-
-// This class receives memory messages in child processes.
-// See also: memory_message_filter.h
-class ChildMemoryMessageFilter : public IPC::MessageFilter {
- public:
-  ChildMemoryMessageFilter();
-
-  // IPC::MessageFilter implementation.
-  bool OnMessageReceived(const IPC::Message& message) override;
-
- protected:
-  ~ChildMemoryMessageFilter() override;
-
- private:
-  void OnSetPressureNotificationsSuppressed(bool suppressed);
-
-  DISALLOW_COPY_AND_ASSIGN(ChildMemoryMessageFilter);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_MEMORY_CHILD_MEMORY_MESSAGE_FILTER_H_