Add SystemMonitor::GetMediaDevices()

chrome/browser/chrome_browser_main_linux.h

 // Copyright (c) 2012 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.
 
 // Contains functions used by BrowserMain() that are linux-specific.
 
 #ifndef CHROME_BROWSER_CHROME_BROWSER_MAIN_LINUX_H_
 #define CHROME_BROWSER_CHROME_BROWSER_MAIN_LINUX_H_
 #pragma once
 
 #include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
 #include "chrome/browser/chrome_browser_main_posix.h"
 
 namespace chrome {
 class MediaDeviceNotificationsLinux;
 }
 
 class ChromeBrowserMainPartsLinux : public ChromeBrowserMainPartsPosix {
  public:
   explicit ChromeBrowserMainPartsLinux(
       const content::MainFunctionParams& parameters);
   virtual ~ChromeBrowserMainPartsLinux();
 
   // ChromeBrowserMainParts overrides.
   virtual void PreProfileInit() OVERRIDE;
 
  private:
-  scoped_refptr<chrome::MediaDeviceNotificationsLinux>

[vandebo (ex-Chrome), 2012/05/17 21:17:08]

Why move the notifiers into the consumer class?  They complete the
implementation of functionality defined in base and only need to be constructed
once, not once per consumer.  It seems like MediaDeviceManager should just be a
consumer of the base API.

-      media_device_notifications_linux_;
-
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainPartsLinux);
 };
 
 #endif  // CHROME_BROWSER_CHROME_BROWSER_MAIN_LINUX_H_