Migrate ChromeOS to base::MemoryPressureMonitor

content/browser/memory_pressure_observer.cc

Index: content/browser/memory_pressure_observer.cc
diff --git a/content/browser/memory_pressure_observer.cc b/content/browser/memory_pressure_observer.cc
deleted file mode 100644
index d1ae7601096140236625f6a561716c80a748e955..0000000000000000000000000000000000000000
--- a/content/browser/memory_pressure_observer.cc
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2014 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/public/browser/memory_pressure_observer.h"
-
-#include "content/browser/browser_main_loop.h"
-
-#if defined(OS_CHROMEOS)
-namespace content {
-
-base::MemoryPressureObserverChromeOS* GetMemoryPressureObserver() {
-  DCHECK(BrowserMainLoop::GetInstance());
-  return BrowserMainLoop::GetInstance()->memory_pressure_observer();
-}
-
-}  // namespace content
-#endif