First pass as implementing the greasemonkey API. This patch

webkit/glue/webframe_impl.cc

 /*
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1534 matching lines @@
   LoadAlternateHTMLString(failed_request.get(), std::string(),
                           error.GetFailedURL(), replace);
 
   WebErrorImpl weberror_impl(error);
   alt_error_page_fetcher_.reset(
       new AltErrorPageResourceFetcher(webview_impl_, weberror_impl, this,
                                       error_page_url));
 }
 
 void WebFrameImpl::ExecuteJavaScript(const std::string& js_code,
-                                     const GURL& script_url) {
+                                     const GURL& script_url,
+                                     int start_line) {
   WebCore::ScriptSourceCode source_code(
       webkit_glue::StdStringToString(js_code),
       webkit_glue::GURLToKURL(script_url),
-      1);  // base line number (for errors)
+      start_line);
   frame_->loader()->executeScript(source_code);
 }
 
 std::wstring WebFrameImpl::GetName() {
   return webkit_glue::StringToStdWString(frame_->tree()->name());
 }
 
 WebTextInput* WebFrameImpl::GetTextInput() {
   if (!webtextinput_impl_.get()) {
     webtextinput_impl_.reset(new WebTextInputImpl(this));
@@ skipping 273 matching lines @@
   return password_listeners_.get(input_element);
 }
 
 void WebFrameImpl::ClearPasswordListeners() {
   for (PasswordListenerMap::iterator iter = password_listeners_.begin();
        iter != password_listeners_.end(); ++iter) {
     delete iter->second;
   }
   password_listeners_.clear();
 }