Move Singleton and related structs to namespace base

content/browser/download/mhtml_generation_manager.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/browser/download/mhtml_generation_manager.h"
 
 #include "base/bind.h"
 #include "base/files/file.h"
 #include "base/stl_util.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
@@ skipping 67 matching lines @@
     int exit_code) {
   MHTMLGenerationManager::GetInstance()->RenderProcessExited(this);
 }
 
 void MHTMLGenerationManager::Job::RenderProcessHostDestroyed(
     RenderProcessHost* host) {
   host_ = NULL;
 }
 
 MHTMLGenerationManager* MHTMLGenerationManager::GetInstance() {
-  return Singleton<MHTMLGenerationManager>::get();
+  return base::Singleton<MHTMLGenerationManager>::get();
 }
 
 MHTMLGenerationManager::MHTMLGenerationManager() {
 }
 
 MHTMLGenerationManager::~MHTMLGenerationManager() {
   STLDeleteValues(&id_to_job_);
 }
 
 void MHTMLGenerationManager::SaveMHTML(WebContents* web_contents,
@@ skipping 130 matching lines @@
        ++it) {
     if (it->second == job) {
       JobFinished(it->first, -1);
       return;
     }
   }
   NOTREACHED();
 }
 
 }  // namespace content