First pass as implementing the greasemonkey API. This patch

chrome/renderer/render_view_unittest.cc

 // Copyright (c) 2008 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 "base/scoped_ptr.h"
 #include "chrome/renderer/mock_render_process.h"
 #include "chrome/renderer/mock_render_thread.h"
 #include "chrome/renderer/render_view.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/glue/webframe.h"
@@ skipping 18 matching lines @@
   }
 
   // Returns a pointer to the main frame.
   WebFrame* GetMainFrame() {
     return view_->webview()->GetMainFrame();
   }
 
   // Executes the given JavaScript in the context of the main frame. The input
   // is a NULL-terminated UTF-8 string.
   void ExecuteJavaScript(const char* js) {
-    GetMainFrame()->ExecuteJavaScript(js, GURL());
+    GetMainFrame()->ExecuteJavaScript(js,
+                                      GURL(), // script url
+                                      1); // base line number
   }
 
   // Loads the given HTML into the main frame as a data: URL.
   void LoadHTML(const char* html) {
     std::string url_str = "data:text/html;charset=utf-8,";
     url_str.append(html);
     GURL url(url_str);
 
     scoped_ptr<WebRequest> request(WebRequest::Create(url));
     GetMainFrame()->LoadRequest(request.get());
@@ skipping 69 matching lines @@
       ViewHostMsg_UpdateState::ID));
   render_thread_.ClearMessages();
 
   // Change the value of the input. We should have gotten an update state
   // notification. We need to spin the message loop to catch this update.
   ExecuteJavaScript("document.getElementById('elt_text').value = 'foo';");
   ProcessPendingMessages();
   EXPECT_TRUE(render_thread_.GetUniqueMessageMatching(
       ViewHostMsg_UpdateState::ID));
 }