Adding Baseframework of the ResourceManager (all hooks and observers) are being put in place with a…

athena/resource_manager/public/resource_manager_delegate.h

+// 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.
+
+#ifndef ATHENA_RESOURCE_MANAGER_PUBLIC_RESOURCE_MANAGER_DLEGATE_H_
+#define ATHENA_RESOURCE_MANAGER_PUBLIC_RESOURCE_MANAGER_DLEGATE_H_
+
+#include <string>
+
+#include "base/macros.h"
+
+namespace athena {
+
+// The resource manager delegate which abstracts system function calls to allow
+// unit tests to override them.
+class ResourceManagerDelegate {
+ public:
+  static ResourceManagerDelegate* CreateResourceManagerDelegate();
+
+  ResourceManagerDelegate() {}
+  virtual ~ResourceManagerDelegate() {}
+
+  // Returns the percentage of memory used in the system.
+  virtual int GetUsedMemoryInPercent() = 0;
+
+  // Returns the time memory pressure interval time in ms to be used by the
+  // memory pressure monitoring system.
+  virtual int MemoryPressureIntervalInMS() = 0;
+};
+
+}  // namespace athena
+
+#endif  // ATHENA_RESOURCE_MANAGER_PUBLIC_RESOURCE_MANAGER_DLEGATE_H_