Revert of Architecture for cross-process memory notification suppressing

content/child/memory/child_memory_message_filter.cc

Index: content/child/memory/child_memory_message_filter.cc
diff --git a/content/child/memory/child_memory_message_filter.cc b/content/child/memory/child_memory_message_filter.cc
deleted file mode 100644
index 1f3515997714eee9fb3e9146f31adbcd6b645288..0000000000000000000000000000000000000000
--- a/content/child/memory/child_memory_message_filter.cc
+++ /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.
-
-#include "content/child/memory/child_memory_message_filter.h"
-
-#include "base/memory/memory_pressure_listener.h"
-#include "content/common/memory_messages.h"
-
-namespace content {
-
-ChildMemoryMessageFilter::ChildMemoryMessageFilter() {}
-
-ChildMemoryMessageFilter::~ChildMemoryMessageFilter() {}
-
-bool ChildMemoryMessageFilter::OnMessageReceived(const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(ChildMemoryMessageFilter, message)
-    IPC_MESSAGE_HANDLER(MemoryMsg_SetPressureNotificationsSuppressed,
-                        OnSetPressureNotificationsSuppressed)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void ChildMemoryMessageFilter::OnSetPressureNotificationsSuppressed(
-    bool suppressed) {
-  // Enable/disable suppressing memory notifications in the child process.
-  base::MemoryPressureListener::SetNotificationsSuppressed(suppressed);
-}
-
-}  // namespace content