Move UserScript and related into extensions namespace

chrome/browser/extensions/api/tabs/tabs.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/browser/extensions/api/tabs/tabs.h"
 
 #include <algorithm>
 #include <limits>
 #include <vector>
 
@@ skipping 1297 matching lines @@
     if (!GetExtension()->CanExecuteScriptOnPage(
             tab_contents_->web_contents()->GetURL(), tab_id, NULL, &error_)) {
       return false;
     }
 
     tab_contents_->extension_tab_helper()->script_executor()->ExecuteScript(
         extension_id(),
         ScriptExecutor::JAVASCRIPT,
         url.path(),
         ScriptExecutor::TOP_FRAME,
-        UserScript::DOCUMENT_IDLE,
+        extensions::UserScript::DOCUMENT_IDLE,
         ScriptExecutor::MAIN_WORLD,
         base::Bind(&UpdateTabFunction::OnExecuteCodeFinished, this));
 
     *is_async = true;
     return true;
   }
 
   tab_contents_->web_contents()->GetController().LoadURL(
       url, content::Referrer(), content::PAGE_TRANSITION_LINK, std::string());
 
@@ skipping 480 matching lines @@
   // called for every API call the extension made.
   GotLanguage(language);
 }
 
 void DetectTabLanguageFunction::GotLanguage(const std::string& language) {
   SetResult(Value::CreateStringValue(language.c_str()));
   SendResponse(true);
 
   Release();  // Balanced in Run()
 }