Remove renderer notifications of memory pressure.

content/child/memory/child_memory_message_filter.h

-// 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 "base/macros.h"
-#include "base/memory/memory_pressure_listener.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);
-  void OnSimulatePressureNotification(
-      base::MemoryPressureListener::MemoryPressureLevel level);
-  void OnPressureNotification(
-      base::MemoryPressureListener::MemoryPressureLevel level);
-
-  DISALLOW_COPY_AND_ASSIGN(ChildMemoryMessageFilter);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_MEMORY_CHILD_MEMORY_MESSAGE_FILTER_H_