Clean up TCW, make it solely a hub for 1:1 observer/helper objects.

chrome/browser/extensions/execute_code_in_tab_function.cc

 // Copyright (c) 2011 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/browser/extensions/execute_code_in_tab_function.h"
 
 #include "base/bind.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 206 matching lines @@
     DCHECK(false);
   }
 
   ExtensionMsg_ExecuteCode_Params params;
   params.request_id = request_id();
   params.extension_id = extension->id();
   params.is_javascript = is_js_code;
   params.code = code_string;
   params.all_frames = all_frames_;
   params.in_main_world = false;
-  contents->render_view_host()->Send(new ExtensionMsg_ExecuteCode(
-      contents->render_view_host()->routing_id(), params));
+  contents->tab_contents()->render_view_host()->Send(
+      new ExtensionMsg_ExecuteCode(
+          contents->tab_contents()->render_view_host()->routing_id(), params));
 
   Observe(contents->tab_contents());
   AddRef();  // balanced in OnExecuteCodeFinished()
   return true;
 }
 
 bool ExecuteCodeInTabFunction::OnMessageReceived(const IPC::Message& message) {
   if (message.type() != ExtensionHostMsg_ExecuteCodeFinished::ID)
     return false;
 
@@ skipping 20 matching lines @@
   if (!error.empty()) {
     CHECK(!success);
     error_ = error;
   }
 
   SendResponse(success);
 
   Observe(NULL);
   Release();  // balanced in Execute()
 }