Switch from WebDocument::insertUserStyleSheet() to insertStyleSheet().

chrome/renderer/extensions/dispatcher.cc

Index: chrome/renderer/extensions/dispatcher.cc
diff --git a/chrome/renderer/extensions/dispatcher.cc b/chrome/renderer/extensions/dispatcher.cc
index 511a92dcc8669751a95cbd1f6289395e0ba51fe9..efec6f00ec2d69b78286151e5e256552e423d5b4 100644
--- a/chrome/renderer/extensions/dispatcher.cc
+++ b/chrome/renderer/extensions/dispatcher.cc
@@ -1301,8 +1301,7 @@ void Dispatcher::DidCreateDocumentElement(blink::WebFrame* frame) {
                                      "$FONTFAMILY", system_font_family_);
     ReplaceFirstSubstringAfterOffset(&stylesheet, 0,
                                      "$FONTSIZE", system_font_size_);
-    frame->document().insertUserStyleSheet(
-        WebString::fromUTF8(stylesheet), WebDocument::UserStyleAuthorLevel);
+    frame->document().insertStyleSheet(WebString::fromUTF8(stylesheet));
   }
 
   content_watcher_->DidCreateDocumentElement(frame);