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

chrome/browser/cocoa/bubble_view.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 "chrome/browser/cocoa/bubble_view.h"
 
 #import "third_party/GTM/AppKit/GTMNSBezierPath+RoundRect.h"
 #import "third_party/GTM/AppKit/GTMNSColor+Luminance.h"
 #import "third_party/GTM/AppKit/GTMTheme.h"
 
@@ skipping 89 matching lines @@
 
   [[NSColor colorWithDeviceWhite:kWindowEdge alpha:1.0f] set];
   [border stroke];
 
   // Text
   NSColor* textColor = [theme textColorForStyle:GTMThemeStyleToolBar
                                           state:GTMThemeStateActiveWindow];
   NSFont* textFont = [self font];
   scoped_nsobject<NSShadow> textShadow([[NSShadow alloc] init]);
   [textShadow setShadowBlurRadius:0.0f];
-  [textShadow setShadowColor:[textColor gtm_legibleTextColor]];
-  [textShadow setShadowOffset:NSMakeSize(0.0f, -1.0f)];
+  [textShadow.get() setShadowColor:[textColor gtm_legibleTextColor]];
+  [textShadow.get() setShadowOffset:NSMakeSize(0.0f, -1.0f)];
 
   NSDictionary* textDict = [NSDictionary dictionaryWithObjectsAndKeys:
       textColor, NSForegroundColorAttributeName,
       textFont, NSFontAttributeName,
       textShadow.get(), NSShadowAttributeName,
       nil];
   [content_ drawAtPoint:NSMakePoint(kBubbleViewTextPositionX,
                                     kBubbleViewTextPositionY)
          withAttributes:textDict];
 }
 
 @end