Get rid of FileManagerPrivateAPI class

chrome/browser/chromeos/extensions/file_manager/event_router.h

Index: chrome/browser/chromeos/extensions/file_manager/event_router.h
diff --git a/chrome/browser/chromeos/extensions/file_manager/event_router.h b/chrome/browser/chromeos/extensions/file_manager/event_router.h
index d28ed321aacf2523dff6dae771b1b0c509187c9f..2fae6185324b1fa0ce42806fc4ae3b2d5910d489 100644
--- a/chrome/browser/chromeos/extensions/file_manager/event_router.h
+++ b/chrome/browser/chromeos/extensions/file_manager/event_router.h
@@ -24,6 +24,7 @@
 #include "chrome/common/extensions/api/file_manager_private.h"
 #include "chromeos/disks/disk_mount_manager.h"
 #include "chromeos/network/network_state_handler_observer.h"
+#include "components/keyed_service/core/keyed_service.h"
 #include "storage/browser/fileapi/file_system_operation.h"
 
 class PrefChangeRegistrar;
@@ -48,7 +49,8 @@ class DeviceEventRouter;
 
 // Monitors changes in disk mounts, network connection state and preferences
 // affecting File Manager. Dispatches appropriate File Browser events.
-class EventRouter : public chromeos::NetworkStateHandlerObserver,
+class EventRouter : public KeyedService,
+                    public chromeos::NetworkStateHandlerObserver,
                     public drive::FileSystemObserver,
                     public drive::JobListObserver,
                     public drive::DriveServiceObserver,
@@ -57,10 +59,8 @@ class EventRouter : public chromeos::NetworkStateHandlerObserver,
   explicit EventRouter(Profile* profile);
   virtual ~EventRouter();
 
-  void Shutdown();
-
-  // Starts observing file system change events.
-  void ObserveEvents();
+  // KeyedService overrides.
+  virtual void Shutdown() OVERRIDE;
 
   typedef base::Callback<void(bool success)> BoolCallback;
 
@@ -129,6 +129,9 @@ class EventRouter : public chromeos::NetworkStateHandlerObserver,
  private:
   typedef std::map<base::FilePath, FileWatcher*> WatcherMap;
 
+  // Starts observing file system change events.
+  void ObserveEvents();
+
   // Called when prefs related to file manager change.
   void OnFileManagerPrefsChanged();