Mac: Make ScopedTypeRef require explicit constructors

chrome/browser/ui/cocoa/tabs/tab_view.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 "chrome/browser/ui/cocoa/tabs/tab_view.h"
 
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "base/mac/sdk_forward_declarations.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 73 matching lines @@
     case IDR_TAB_ALPHA_LEFT:
       theSelector = @selector(drawTabLeftMaskImage);
       break;
 
     case IDR_TAB_ALPHA_RIGHT:
       theSelector = @selector(drawTabRightMaskImage);
       break;
   }
   DCHECK(theSelector);
 
-  base::scoped_nsobject<NSCustomImageRep> imageRep =
-      [[NSCustomImageRep alloc]
-          initWithDrawSelector:theSelector
-                      delegate:[TabView class]];
+  base::scoped_nsobject<NSCustomImageRep> imageRep([[NSCustomImageRep alloc]
+      initWithDrawSelector:theSelector
+                  delegate:[TabView class]]);
 
   NSImage* newTabButtonImage =
       [[[NSImage alloc] initWithSize:NSMakeSize(imageWidth, 29)] autorelease];
   [newTabButtonImage setCacheMode:NSImageCacheAlways];
   [newTabButtonImage addRepresentation:imageRep];
 
   return newTabButtonImage;
 }
 
 ui::ThreePartImage& GetMaskImage() {
@@ skipping 838 matching lines @@
   NSAffineTransform* transform = [NSAffineTransform transform];
   [transform scaleXBy:-1 yBy:1];
   [transform translateXBy:-17.5 yBy:-0.25];
   [bezierPath transformUsingAffineTransform:transform];
 
   [[NSColor whiteColor] set];
   [bezierPath fill];
 }
 
 @end  // @implementation TabView(MaterialDesign)