Make memory pressure notifier configurable

base/memory/memory_pressure_monitor_chromeos.cc

 // 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 "base/memory/memory_pressure_monitor_chromeos.h"
 
 #include <fcntl.h>
 #include <sys/select.h>
 
 #include "base/metrics/histogram_macros.h"
@@ skipping 212 matching lines @@
   } else if (current_memory_pressure_level_ ==
                MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE &&
              old_pressure ==
                MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL) {
     // When we reducing the pressure level from critical to moderate, we
     // restart the timeout and do not send another notification.
     moderate_pressure_repeat_count_ = 0;
     return;
   }
   moderate_pressure_repeat_count_ = 0;
-  MemoryPressureListener::NotifyMemoryPressure(current_memory_pressure_level_);
+  Notify(current_memory_pressure_level_);
 }
 
 // Gets the used ChromeOS memory in percent.
 int MemoryPressureMonitor::GetUsedMemoryInPercent() {
   base::SystemMemoryInfoKB info;
   if (!base::GetSystemMemoryInfo(&info)) {
     VLOG(1) << "Cannot determine the free memory of the system.";
     return 0;
   }
   // TODO(skuhne): Instead of adding the kernel memory pressure calculation
@@ skipping 22 matching lines @@
   int available_memory =
       info.free + info.swap_free / kSwapWeight + file_memory;
 
   DCHECK(available_memory < total_memory);
   int percentage = ((total_memory - available_memory) * 100) / total_memory;
   return percentage;
 }
 
 }  // namespace chromeos
 }  // namespace base