mac: Update clients of scoped_nsobject.h.

ui/message_center/cocoa/popup_controller.mm

Index: ui/message_center/cocoa/popup_controller.mm
diff --git a/ui/message_center/cocoa/popup_controller.mm b/ui/message_center/cocoa/popup_controller.mm
index 496e08ac20b9c8b612a0b006cb4214551d33e5dc..30badc79bfe10baa78139c4263e9d5c43aa73d98 100644
--- a/ui/message_center/cocoa/popup_controller.mm
+++ b/ui/message_center/cocoa/popup_controller.mm
@@ -97,12 +97,12 @@ enum {
 - (id)initWithNotification:(const message_center::Notification*)notification
              messageCenter:(message_center::MessageCenter*)messageCenter
            popupCollection:(MCPopupCollection*)popupCollection {
-  scoped_nsobject<MCPopupWindow> window(
+  base::scoped_nsobject<MCPopupWindow> window(
       [[MCPopupWindow alloc] initWithContentRect:ui::kWindowSizeDeterminedLater
-                                  styleMask:NSBorderlessWindowMask |
-                                            NSNonactivatingPanelMask
-                                    backing:NSBackingStoreBuffered
-                                      defer:YES]);
+                                       styleMask:NSBorderlessWindowMask |
+                                                 NSNonactivatingPanelMask
+                                         backing:NSBackingStoreBuffered
+                                           defer:YES]);
   if ((self = [super initWithWindow:window])) {
     messageCenter_ = messageCenter;
     popupCollection_ = popupCollection;