Move UserScript and related into extensions namespace

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 11 matching lines @@
 namespace {
 // The length of time to wait after the DOM is complete to try and run user
 // scripts.
 const int kUserScriptIdleTimeoutMs = 200;
 }
 
 using WebKit::WebDocument;
 using WebKit::WebFrame;
 using WebKit::WebString;
 using WebKit::WebView;
-using extensions::Extension;
+
+namespace extensions {
 
 UserScriptScheduler::UserScriptScheduler(
     WebFrame* frame, ExtensionDispatcher* extension_dispatcher)
     : ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)),
       frame_(frame),
       current_location_(UserScript::UNDEFINED),
       has_run_idle_(false),
       extension_dispatcher_(extension_dispatcher) {
   for (int i = UserScript::UNDEFINED; i < UserScript::RUN_LOCATION_LAST; ++i) {
     pending_execution_map_[static_cast<UserScript::RunLocation>(i)] =
@@ skipping 171 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;
 }
+
+}  // namespace extensions