Avoid spurious errors about NSColor*-CGColor* and NSSize-CGSize conversions

chrome/browser/cocoa/gradient_button_cell.mm

 // Copyright (c) 2009 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 "base/scoped_nsobject.h"
 #include "chrome/browser/cocoa/gradient_button_cell.h"
 #import "third_party/GTM/AppKit/GTMTheme.h"
 #import "third_party/GTM/AppKit/GTMNSColor+Luminance.h"
 
 @interface GradientButtonCell (Private)
@@ skipping 301 matching lines @@
     CGContextRef context =
         (CGContextRef)([[NSGraphicsContext currentContext] graphicsPort]);
 
     NSColor* color = [theme iconColorForStyle:GTMThemeStyleToolBarButton
                                         state:YES];
 
     if (isTemplate) {
       scoped_nsobject<NSShadow> shadow([[NSShadow alloc] init]);
       NSColor *shadowColor = [color gtm_legibleTextColor];
       shadowColor = [shadowColor colorWithAlphaComponent:0.25];
-      [shadow setShadowColor:shadowColor];
-      [shadow setShadowOffset:NSMakeSize(0, -1.0)];
+      [shadow.get() setShadowColor:shadowColor];
+      [shadow.get() setShadowOffset:NSMakeSize(0, -1.0)];
       [shadow setShadowBlurRadius:1.0];
       [shadow set];
     }
 
     [self drawUnderlayImageWithFrame:cellFrame inView:controlView];
 
     CGContextBeginTransparencyLayer(context, 0);
     NSRect imageRect = NSZeroRect;
     imageRect.size = [[self image] size];
     NSRect drawRect = [self imageRectForBounds:cellFrame];
@@ skipping 28 matching lines @@
     imageRect.size = [underlayImage_ size];
     [underlayImage_ setFlipped:[controlView isFlipped]];
     [underlayImage_ drawInRect:[self imageRectForBounds:cellFrame]
                       fromRect:imageRect
                      operation:NSCompositeSourceOver
                       fraction:[self isEnabled] ? 1.0 : 0.5];
   }
 }
 
 @end