Take 2 at implementing activeTab.

chrome/renderer/extensions/user_script_scheduler.cc

 // Copyright (c) 2012 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/extensions/user_script_scheduler.h"
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "chrome/common/extensions/extension_error_utils.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
@@ skipping 115 matching lines @@
     }
   }
 }
 
 void UserScriptScheduler::ExecuteCodeImpl(
     const ExtensionMsg_ExecuteCode_Params& params) {
   const Extension* extension = extension_dispatcher_->extensions()->GetByID(
       params.extension_id);
   content::RenderView* render_view =
       content::RenderView::FromWebView(frame_->view());
+  ExtensionHelper* extension_helper = ExtensionHelper::Get(render_view);
 
   // Since extension info is sent separately from user script info, they can
   // be out of sync. We just ignore this situation.
   if (!extension) {
     render_view->Send(new ExtensionHostMsg_ExecuteCodeFinished(
         render_view->GetRoutingID(), params.request_id, true, -1, ""));
     return;
   }
 
   std::vector<WebFrame*> frame_vector;
   frame_vector.push_back(frame_);
   if (params.all_frames)
     GetAllChildFrames(frame_, &frame_vector);
 
   for (std::vector<WebFrame*>::iterator frame_it = frame_vector.begin();
        frame_it != frame_vector.end(); ++frame_it) {
     WebFrame* frame = *frame_it;
     if (params.is_javascript) {
       // We recheck access here in the renderer for extra safety against races
       // with navigation.
       //
       // But different frames can have different URLs, and the extension might
       // only have access to a subset of them. For the top frame, we can
       // immediately send an error and stop because the browser process
       // considers that an error too.
       //
       // For child frames, we just skip ones the extension doesn't have access
       // to and carry on.
       if (!extension->CanExecuteScriptOnPage(frame->document().url(),
-                                             NULL, NULL)) {
+                                             extension_helper->tab_id(),
+                                             NULL,
+                                             NULL)) {
         if (frame->parent()) {
           continue;
         } else {
           render_view->Send(new ExtensionHostMsg_ExecuteCodeFinished(
               render_view->GetRoutingID(),
               params.request_id,
               false,
               -1,
               ExtensionErrorUtils::FormatErrorMessage(
                   extension_manifest_errors::kCannotAccessPage,
@@ skipping 35 matching lines @@
   if (!parent_frame)
     return false;
 
   for (WebFrame* child_frame = parent_frame->firstChild(); child_frame;
        child_frame = child_frame->nextSibling()) {
     frames_vector->push_back(child_frame);
     GetAllChildFrames(child_frame, frames_vector);
   }
   return true;
 }