mac: Update clients of scoped_nsobject.h.

chrome/browser/ui/cocoa/tabs/tab_view.mm

Index: chrome/browser/ui/cocoa/tabs/tab_view.mm
diff --git a/chrome/browser/ui/cocoa/tabs/tab_view.mm b/chrome/browser/ui/cocoa/tabs/tab_view.mm
index 443f86b63c4051f545f2d58b086b889eb93eb2d3..cda5b8e0079b0b1ad2c495e057d225be4bcf068c 100644
--- a/chrome/browser/ui/cocoa/tabs/tab_view.mm
+++ b/chrome/browser/ui/cocoa/tabs/tab_view.mm
@@ -211,7 +211,7 @@ const CGFloat kRapidCloseDist = 2.5;
   // strip and then deallocated. This will also result in *us* being
   // deallocated. Both these are bad, so we prevent this by retaining the
   // controller.
-  scoped_nsobject<TabController> controller([controller_ retain]);
+  base::scoped_nsobject<TabController> controller([controller_ retain]);
 
   // Try to initiate a drag. This will spin a custom event loop and may
   // dispatch other mouse events.
@@ -379,7 +379,7 @@ const CGFloat kRapidCloseDist = 2.5;
     // Draw a mouse hover gradient for the default themes.
     if (!selected && hoverAlpha > 0) {
       if (themeProvider && !hasCustomTheme) {
-        scoped_nsobject<NSGradient> glow([NSGradient alloc]);
+        base::scoped_nsobject<NSGradient> glow([NSGradient alloc]);
         [glow initWithStartingColor:[NSColor colorWithCalibratedWhite:1.0
                                         alpha:1.0 * hoverAlpha]
                         endingColor:[NSColor colorWithCalibratedWhite:1.0