Delete athena/

athena/resource_manager/memory_pressure_notifier.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 "athena/resource_manager/memory_pressure_notifier.h"
-
-#include "athena/resource_manager/public/resource_manager_delegate.h"
-#include "base/time/time.h"
-
-
-namespace athena {
-
-MemoryPressureNotifier::MemoryPressureNotifier(
-    MemoryPressureObserver* listener)
-      : listener_(listener),
-        current_pressure_(ResourceManager::MEMORY_PRESSURE_UNKNOWN) {
-  StartObserving();
-}
-
-MemoryPressureNotifier::~MemoryPressureNotifier() {
-  StopObserving();
-}
-
-void MemoryPressureNotifier::StartObserving() {
-  int time_in_ms = listener_->GetDelegate()->MemoryPressureIntervalInMS();
-  timer_.Start(FROM_HERE,
-               base::TimeDelta::FromMilliseconds(time_in_ms),
-               base::Bind(&MemoryPressureNotifier::CheckMemoryPressure,
-                          base::Unretained(this)));
-}
-
-void MemoryPressureNotifier::StopObserving() {
-  // If StartObserving failed, StopObserving will still get called.
-  timer_.Stop();
-}
-
-void MemoryPressureNotifier::CheckMemoryPressure() {
-  ResourceManager::MemoryPressure pressure =
-      GetMemoryPressureLevelFromFillLevel(
-          listener_->GetDelegate()->GetUsedMemoryInPercent());
-  if (current_pressure_ != pressure ||
-      (pressure != ResourceManager::MEMORY_PRESSURE_LOW &&
-       pressure != ResourceManager::MEMORY_PRESSURE_UNKNOWN)) {
-    // If we are anything worse than |MEMORY_PRESSURE_LOW|, we notify the
-    // listener.
-    current_pressure_ = pressure;
-    listener_->OnMemoryPressure(current_pressure_);
-  }
-}
-
-ResourceManager::MemoryPressure
-MemoryPressureNotifier::GetMemoryPressureLevelFromFillLevel(
-    int memory_fill_level) {
-  if (memory_fill_level == 0)
-    return ResourceManager::MEMORY_PRESSURE_UNKNOWN;
-  if (memory_fill_level < 50)
-    return ResourceManager::MEMORY_PRESSURE_LOW;
-  if (memory_fill_level < 75)
-    return ResourceManager::MEMORY_PRESSURE_MODERATE;
-  if (memory_fill_level < 90)
-    return ResourceManager::MEMORY_PRESSURE_HIGH;
-  return ResourceManager::MEMORY_PRESSURE_CRITICAL;
-}
-
-}  // namespace athena