Remove renderer notifications of memory pressure.

content/public/browser/memory_pressure_controller.h

-// 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.
-
-#ifndef CONTENT_PUBLIC_BROWSER_MEMORY_PRESSURE_CONTROLLER_H_
-#define CONTENT_PUBLIC_BROWSER_MEMORY_PRESSURE_CONTROLLER_H_
-
-#include "base/memory/memory_pressure_listener.h"
-#include "content/common/content_export.h"
-
-namespace content {
-
-class BrowserChildProcessHost;
-class RenderProcessHost;
-
-// Allows content embedders to forward memory pressure events from the main
-// browser process to children processes. For more details see
-// content/browser/memory/memory_pressure_controller_impl.h.
-class CONTENT_EXPORT MemoryPressureController {
- public:
-
-  // Sends a memory pressure notification to the specified browser child process
-  // via its attached MemoryMessageFilter. May be called on any thread.
-  static void SendPressureNotification(
-      const BrowserChildProcessHost* child_process_host,
-      base::MemoryPressureListener::MemoryPressureLevel level);
-
-  // Sends a memory pressure notification to the specified renderer process via
-  // its attached MemoryMessageFilter. May be called on any thread.
-  static void SendPressureNotification(
-      const RenderProcessHost* render_process_host,
-      base::MemoryPressureListener::MemoryPressureLevel level);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(MemoryPressureController);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_PUBLIC_BROWSER_MEMORY_PRESSURE_CONTROLLER_H_