Architecture for cross-process memory notification suppressing

content/browser/memory/memory_message_filter.cc

+// 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/browser/memory/memory_message_filter.h"
+
+#include "content/browser/memory/memory_pressure_controller.h"
+#include "content/common/memory_messages.h"
+
+namespace content {
+
+MemoryMessageFilter::MemoryMessageFilter()
+    : BrowserMessageFilter(MemoryMsgStart) {}
+
+MemoryMessageFilter::~MemoryMessageFilter() {}
+
+void MemoryMessageFilter::OnFilterAdded(IPC::Sender* sender) {
+  MemoryPressureController::GetInstance()->OnMemoryMessageFilterAdded(this);
+}
+
+void MemoryMessageFilter::OnChannelClosing() {
+  MemoryPressureController::GetInstance()->OnMemoryMessageFilterRemoved(this);
+}
+
+bool MemoryMessageFilter::OnMessageReceived(const IPC::Message& message) {
+  return false;
+}
+
+void MemoryMessageFilter::SendSetPressureNotificationsSuppressed(
+    bool suppressed) {
+  Send(new MemoryMsg_SetPressureNotificationsSuppressed(suppressed));
+}
+
+}  // namespace content