Move a bunch of code in content\renderer to the content namespace.

content/renderer/external_popup_menu.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 "content/renderer/external_popup_menu.h"
 
 #include "content/common/view_messages.h"
 #include "content/renderer/render_view_impl.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebExternalPopupMenuClient.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebRect.h"
 
+namespace content {
+
 ExternalPopupMenu::ExternalPopupMenu(
     RenderViewImpl* render_view,
     const WebKit::WebPopupMenuInfo& popup_menu_info,
     WebKit::WebExternalPopupMenuClient* popup_menu_client)
     : render_view_(render_view),
       popup_menu_info_(popup_menu_info),
       popup_menu_client_(popup_menu_client) {
 }
 
 void ExternalPopupMenu::show(const WebKit::WebRect& bounds) {
@@ skipping 32 matching lines @@
                                        const std::vector<int>& indices) {
   if (!popup_menu_client_)
     return;
   if (canceled)
     popup_menu_client_->didCancel();
   else
     popup_menu_client_->didAcceptIndices(indices);
 }
 #endif
 
+}  // namespace content