Change return type of FaviconTabHelper::GetFavicon() to gfx::Image.

chrome/browser/ui/cocoa/tab_contents/favicon_util_mac.mm

Index: chrome/browser/ui/cocoa/tab_contents/favicon_util_mac.mm
diff --git a/chrome/browser/ui/cocoa/tab_contents/favicon_util_mac.mm b/chrome/browser/ui/cocoa/tab_contents/favicon_util_mac.mm
index 24b1342baef16e1f404d4dcd935b0651e1ce419a..77107f13b3fb2e4a66f858c79073f57a49635753 100644
--- a/chrome/browser/ui/cocoa/tab_contents/favicon_util_mac.mm
+++ b/chrome/browser/ui/cocoa/tab_contents/favicon_util_mac.mm
@@ -19,9 +19,7 @@ namespace mac {
 
 NSImage* FaviconForTabContents(TabContents* contents) {
   if (contents && contents->favicon_tab_helper()->FaviconIsValid()) {
-    CGColorSpaceRef color_space = base::mac::GetSystemColorSpace();
-    NSImage* image = gfx::SkBitmapToNSImageWithColorSpace(
-        contents->favicon_tab_helper()->GetFavicon(), color_space);
+    NSImage* image = contents->favicon_tab_helper()->GetFavicon().ToNSImage();
     // The |image| could be nil if the bitmap is null. In that case, fallback
     // to the default image.
     if (image) {