First fix to minimize copying of image data.

chrome/browser/dom_ui/dom_ui_favicon_source.cc

Index: chrome/browser/dom_ui/dom_ui_favicon_source.cc
diff --git a/chrome/browser/dom_ui/dom_ui_favicon_source.cc b/chrome/browser/dom_ui/dom_ui_favicon_source.cc
index d117b784987bbdddc6fd82328535f040ef7338d2..536e17519420663859439ca474abbc9f0f3973e1 100644
--- a/chrome/browser/dom_ui/dom_ui_favicon_source.cc
+++ b/chrome/browser/dom_ui/dom_ui_favicon_source.cc
@@ -54,9 +54,9 @@ void DOMUIFavIconSource::OnFavIconDataAvailable(
     SendResponse(request_id, data);
   } else {
     if (!default_favicon_.get()) {
-      default_favicon_ = new RefCountedBytes;
-      ResourceBundle::GetSharedInstance().LoadImageResourceBytes(
-          IDR_DEFAULT_FAVICON, &default_favicon_->data);
+      default_favicon_ =
+          ResourceBundle::GetSharedInstance().LoadImageResourceBytes(
+              IDR_DEFAULT_FAVICON);
     }
 
     SendResponse(request_id, default_favicon_);