Isolated FS for media devices.

base/system_monitor/system_monitor.h

Index: base/system_monitor/system_monitor.h
diff --git a/base/system_monitor/system_monitor.h b/base/system_monitor/system_monitor.h
index 359feb67baa07a8c82594734589669f64ba1de5c..9d25a6e01b3886e85f17c17bbb18205a62805096 100644
--- a/base/system_monitor/system_monitor.h
+++ b/base/system_monitor/system_monitor.h
@@ -149,7 +149,8 @@ class BASE_EXPORT SystemMonitor {
                                        MediaDeviceType type,
                                        const FilePath::StringType& location) {}
 
-    virtual void OnMediaDeviceDetached(const std::string& id) {}
+    virtual void OnMediaDeviceDetached(const std::string& id,
+                                       const FilePath::StringType& location) {}
 
    protected:
     virtual ~DevicesChangedObserver() {}
@@ -208,8 +209,9 @@ class BASE_EXPORT SystemMonitor {
   void NotifyMediaDeviceAttached(const std::string& id,
                                  const string16& name,
                                  MediaDeviceType type,
-                                 const FilePath::StringType& data);
-  void NotifyMediaDeviceDetached(const std::string& id);
+                                 const FilePath::StringType& location);
+  void NotifyMediaDeviceDetached(const std::string& id,
+                                 const FilePath::StringType& location);
   void NotifyPowerStateChange();
   void NotifySuspend();
   void NotifyResume();