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

chrome/browser/renderer_host/render_view_host.h

Index: chrome/browser/renderer_host/render_view_host.h
===================================================================
--- chrome/browser/renderer_host/render_view_host.h	(revision 26222)
+++ chrome/browser/renderer_host/render_view_host.h	(working copy)
@@ -258,9 +258,11 @@
   void ExecuteJavascriptInWebFrame(const std::wstring& frame_xpath,
                                    const std::wstring& jscript);
 
-  // Insert some css into a frame in the page.
+  // Insert some css into a frame in the page. |id| is optional, and specifies
+  // the element id given when inserting/replacing the style element.
   void InsertCSSInWebFrame(const std::wstring& frame_xpath,
-                           const std::string& css);
+                           const std::string& css,
+                           const std::string& id);
 
   // Logs a message to the console of a frame in the page.
   void AddMessageToConsole(const string16& frame_xpath,