Move content's a plugin, ppapi_plugin, utility, and worker subdirectories to the content namespace.

content/worker/worker_webapplicationcachehost_impl.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/worker/worker_webapplicationcachehost_impl.h"
 
 #include "content/common/appcache/appcache_dispatcher.h"
 #include "content/worker/worker_thread.h"
 
+namespace content {
+
 WorkerWebApplicationCacheHostImpl::WorkerWebApplicationCacheHostImpl(
     const WorkerAppCacheInitInfo& init_info,
     WebKit::WebApplicationCacheHostClient* client)
     : WebApplicationCacheHostImpl(client,
           WorkerThread::current()->appcache_dispatcher()->backend_proxy()) {
   backend()->SelectCacheForSharedWorker(host_id(),
                                           init_info.main_resource_appcache_id);
 }
 
 void WorkerWebApplicationCacheHostImpl::willStartMainResourceRequest(
@@ skipping 12 matching lines @@
     bool) {
 }
 
 void WorkerWebApplicationCacheHostImpl::selectCacheWithoutManifest() {
 }
 
 bool WorkerWebApplicationCacheHostImpl::selectCacheWithManifest(
     const WebKit::WebURL&) {
   return true;
 }
+
+}  // namespace content