diff -r 000000000000 -r 6474c204b198 content/media/webrtc/LoadMonitor.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/webrtc/LoadMonitor.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,63 @@
+/* -*- Mode: C++; tab-width: 50; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef _LOADMONITOR_H_
+#define _LOADMONITOR_H_
+
+#include "mozilla/Mutex.h"
+#include "mozilla/CondVar.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/Atomics.h"
+#include "nsAutoPtr.h"
+#include "nsCOMPtr.h"
+#include "nsIThread.h"
+#include "nsIObserver.h"
+
+namespace mozilla {
+class LoadInfoUpdateRunner;
+class LoadInfoCollectRunner;
+
+class LoadNotificationCallback
+{
+public:
+    virtual void LoadChanged(float aSystemLoad, float aProcessLoad) = 0;
+};
+
+class LoadMonitor MOZ_FINAL : public nsIObserver
+{
+public:
+    NS_DECL_THREADSAFE_ISUPPORTS
+    NS_DECL_NSIOBSERVER
+
+    LoadMonitor(int aLoadUpdateInterval);
+    ~LoadMonitor();
+
+    nsresult Init(nsRefPtr<LoadMonitor> &self);
+    void SetLoadChangeCallback(LoadNotificationCallback* aCallback);
+    void Shutdown();
+    float GetSystemLoad();
+    float GetProcessLoad();
+
+    friend class LoadInfoCollectRunner;
+
+private:
+
+    void SetProcessLoad(float load);
+    void SetSystemLoad(float load);
+    void FireCallbacks();
+
+    int                  mLoadUpdateInterval;
+    mozilla::Mutex       mLock;
+    mozilla::CondVar     mCondVar;
+    bool                 mShutdownPending;
+    nsCOMPtr<nsIThread>  mLoadInfoThread;
+    float                mSystemLoad;
+    float                mProcessLoad;
+    LoadNotificationCallback* mLoadNotificationCallback;
+};
+
+} //namespace
+
+#endif /* _LOADMONITOR_H_ */