mac: Update clients of scoped_nsobject.h.

ui/base/cocoa/hover_image_button_unittest.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ui/base/cocoa/hover_image_button.h"
 
-#import "base/memory/scoped_nsobject.h"
+#import "base/mac/scoped_nsobject.h"
 #import "ui/base/test/ui_cocoa_test_helper.h"
 
 namespace {
 
 class HoverImageButtonTest : public ui::CocoaTest {
  public:
   HoverImageButtonTest() {
     NSRect content_frame = [[test_window() contentView] frame];
-    scoped_nsobject<HoverImageButton> button(
+    base::scoped_nsobject<HoverImageButton> button(
         [[HoverImageButton alloc] initWithFrame:content_frame]);
     button_ = button.get();
     [[test_window() contentView] addSubview:button_];
   }
 
   void DrawRect() {
     [button_ lockFocus];
     [button_ drawRect:[button_ bounds]];
     [button_ unlockFocus];
   }
@@ skipping 11 matching lines @@
   [button_ mouseEntered:nil];
   DrawRect();
   EXPECT_EQ([button_ image], hover);
   [button_ mouseExited:nil];
   DrawRect();
   EXPECT_NE([button_ image], hover);
   EXPECT_EQ([button_ image], image);
 }
 
 }  // namespace