Use hi-resolution favicon variants if available.

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..95b3f47e94c45cbeecca28d840302572f5617464 100644
--- a/chrome/browser/ui/cocoa/tab_contents/favicon_util_mac.mm
+++ b/chrome/browser/ui/cocoa/tab_contents/favicon_util_mac.mm
@@ -13,15 +13,13 @@
 #include "skia/ext/skia_utils_mac.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/resource/resource_bundle.h"
-#include "ui/gfx/mac/nsimage_cache.h"
 
 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()->GetFaviconImage().ToNSImage();
     // The |image| could be nil if the bitmap is null. In that case, fallback
     // to the default image.
     if (image) {