Move the remaning files in content\common to the content namespace.

content/common/request_extra_data.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/common/request_extra_data.h"
 
 using WebKit::WebReferrerPolicy;
 using WebKit::WebString;
 
+namespace content {
+
 RequestExtraData::RequestExtraData(WebReferrerPolicy referrer_policy,
                                    const WebString& custom_user_agent,
                                    bool is_main_frame,
                                    int64 frame_id,
                                    bool parent_is_main_frame,
                                    int64 parent_frame_id,
                                    bool allow_download,
-                                   content::PageTransition transition_type,
+                                   PageTransition transition_type,
                                    int transferred_request_child_id,
                                    int transferred_request_request_id)
     : webkit_glue::WebURLRequestExtraDataImpl(referrer_policy,
                                               custom_user_agent),
       is_main_frame_(is_main_frame),
       frame_id_(frame_id),
       parent_is_main_frame_(parent_is_main_frame),
       parent_frame_id_(parent_frame_id),
       allow_download_(allow_download),
       transition_type_(transition_type),
       transferred_request_child_id_(transferred_request_child_id),
       transferred_request_request_id_(transferred_request_request_id) {
 }
 
 RequestExtraData::~RequestExtraData() {
 }
+
+}  // namespace content