Add a receiver interface to RemovableStorageNotifications.

chrome/browser/system_monitor/portable_device_watcher_win.h

Index: chrome/browser/system_monitor/portable_device_watcher_win.h
diff --git a/chrome/browser/system_monitor/portable_device_watcher_win.h b/chrome/browser/system_monitor/portable_device_watcher_win.h
index 0d16ba63bf11b80d1d8c7a7dbb39e820b74622a9..ff0d259372117df4442fd9989eb95d5c2f78ce36 100644
--- a/chrome/browser/system_monitor/portable_device_watcher_win.h
+++ b/chrome/browser/system_monitor/portable_device_watcher_win.h
@@ -91,6 +91,10 @@ class PortableDeviceWatcherWin {
   static string16 GetStoragePathFromStorageId(
       const std::string& storage_unique_id);
 
+  // Set the volume notifications object to be used when new
+  // devices are found.
+  void SetNotifications(RemovableStorageNotifications::Receiver* notifications);
+
  private:
   friend class test::TestPortableDeviceWatcherWin;
 
@@ -132,6 +136,9 @@ class PortableDeviceWatcherWin {
   // Used by |media_task_runner_| to create cancelable callbacks.
   base::WeakPtrFactory<PortableDeviceWatcherWin> weak_ptr_factory_;
 
+  // The notifications object to use to signal newly attached devices.
+  RemovableStorageNotifications::Receiver* storage_notifications_;
+
   DISALLOW_COPY_AND_ASSIGN(PortableDeviceWatcherWin);
 };