Move UserScript and related into extensions namespace

chrome/renderer/extensions/user_script_slave.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_slave.h"
 
 #include <map>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 24 matching lines @@
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
 
 using WebKit::WebFrame;
 using WebKit::WebSecurityOrigin;
 using WebKit::WebSecurityPolicy;
 using WebKit::WebString;
 using WebKit::WebVector;
 using WebKit::WebView;
 using content::RenderThread;
-using extensions::Extension;
+
+namespace extensions {
 
 // These two strings are injected before and after the Greasemonkey API and
 // user script to wrap it in an anonymous scope.
 static const char kUserScriptHead[] = "(function (unsafeWindow) {\n";
 static const char kUserScriptTail[] = "\n})(window);";
 
 int UserScriptSlave::GetIsolatedWorldIdForExtension(
     const Extension* extension, WebFrame* frame) {
   static int g_next_isolated_world_id = 1;
 
@@ skipping 305 matching lines @@
     if (num_scripts)
       UMA_HISTOGRAM_TIMES("Extensions.InjectEnd_Time", timer.Elapsed());
   } else if (location == UserScript::DOCUMENT_IDLE) {
     UMA_HISTOGRAM_COUNTS_100("Extensions.InjectIdle_ScriptCount", num_scripts);
     if (num_scripts)
       UMA_HISTOGRAM_TIMES("Extensions.InjectIdle_Time", timer.Elapsed());
   } else {
     NOTREACHED();
   }
 }
+
+}  // namespace extensions