Move a bunch of code in content\common (as well as a few left in renderer) to the content namespace.

content/common/appcache/appcache_backend_proxy.cc

 // Copyright (c) 2011 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/appcache/appcache_backend_proxy.h"
 
 #include "content/common/appcache_messages.h"
 
+namespace content {
+
 void AppCacheBackendProxy::RegisterHost(int host_id) {
   sender_->Send(new AppCacheHostMsg_RegisterHost(host_id));
 }
 
 void AppCacheBackendProxy::UnregisterHost(int host_id) {
   sender_->Send(new AppCacheHostMsg_UnregisterHost(host_id));
 }
 
 void AppCacheBackendProxy::SetSpawningHostId(int host_id,
                                              int spawning_host_id) {
@@ skipping 48 matching lines @@
 bool AppCacheBackendProxy::SwapCache(int host_id) {
   bool result = false;
   sender_->Send(new AppCacheHostMsg_SwapCache(host_id, &result));
   return result;
 }
 
 void AppCacheBackendProxy::GetResourceList(
     int host_id, std::vector<appcache::AppCacheResourceInfo>* resource_infos) {
   sender_->Send(new AppCacheHostMsg_GetResourceList(host_id, resource_infos));
 }
+
+}  // namespace content