mac: Update clients of scoped_nsobject.h.

chrome/browser/ui/cocoa/history_overlay_controller.mm

Index: chrome/browser/ui/cocoa/history_overlay_controller.mm
diff --git a/chrome/browser/ui/cocoa/history_overlay_controller.mm b/chrome/browser/ui/cocoa/history_overlay_controller.mm
index f211afc3a40cc509550b5bdfd48350f47f15f9c2..593a942fa13949051635ab8daa1784ebcc7d654a 100644
--- a/chrome/browser/ui/cocoa/history_overlay_controller.mm
+++ b/chrome/browser/ui/cocoa/history_overlay_controller.mm
@@ -62,7 +62,7 @@ const CGFloat kGestureCompleteProgress = 0.3;
     NSRect arrowRect = NSMakeRect(offset, 0, kShieldRadius, kShieldHeight);
     arrowRect = NSInsetRect(arrowRect, 10, 0);  // Give a little padding.
 
-    scoped_nsobject<NSImageView> imageView(
+    base::scoped_nsobject<NSImageView> imageView(
         [[NSImageView alloc] initWithFrame:arrowRect]);
     [imageView setImage:image];
     [imageView setAutoresizingMask:NSViewMinYMargin | NSViewMaxYMargin];
@@ -162,7 +162,7 @@ const CGFloat kGestureCompleteProgress = 0.3;
 
   NSView* overlay = self.view;
 
-  scoped_nsobject<CAAnimation> animation(
+  base::scoped_nsobject<CAAnimation> animation(
       [[overlay animationForKey:@"alphaValue"] copy]);
   [animation setDelegate:self];
   [animation setDuration:kFadeOutDurationSeconds];