ExtensionShelf now uses the BookmarkExtensionBackground, just like the Bookma...

chrome/renderer/user_script_slave.cc

 // 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.
 
 #include "chrome/renderer/user_script_slave.h"
 
 #include "app/resource_bundle.h"
 #include "base/histogram.h"
 #include "base/logging.h"
 #include "base/perftimer.h"
@@ skipping 112 matching lines @@
     UserScript* script = scripts_[i];
     if (!script->MatchesUrl(frame->url()))
       continue;  // This frame doesn't match the script url pattern, skip it.
 
     ++num_matched;
     // CSS files are always injected on document start before js scripts.
     if (location == UserScript::DOCUMENT_START) {
       for (size_t j = 0; j < script->css_scripts().size(); ++j) {
         UserScript::File& file = script->css_scripts()[j];
         frame->insertStyleText(
-            WebString::fromUTF8(file.GetContent().as_string()));
+            WebString::fromUTF8(file.GetContent().as_string()), WebString());
       }
     }
     if (script->run_location() == location) {
       for (size_t j = 0; j < script->js_scripts().size(); ++j) {
         UserScript::File &file = script->js_scripts()[j];
         std::string content = file.GetContent().as_string();
 
         // We add this dumb function wrapper for standalone user script to
         // emulate what Greasemonkey does.
         if (script->is_standalone()) {
@@ skipping 29 matching lines @@
     HISTOGRAM_TIMES("UserScripts:DocStart:Time", timer.Elapsed());
   } else {
     HISTOGRAM_COUNTS_100("UserScripts:DocEnd:Count", num_matched);
     HISTOGRAM_TIMES("UserScripts:DocEnd:Time", timer.Elapsed());
   }
 
   LOG(INFO) << "Injected " << num_matched << " user scripts into " <<
       frame->url().spec().data();
   return true;
 }