Move Singleton and related structs to namespace base

chrome/browser/plugins/chrome_plugin_service_filter.h

 // 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.
 
 #ifndef CHROME_BROWSER_PLUGINS_CHROME_PLUGIN_SERVICE_FILTER_H_
 #define CHROME_BROWSER_PLUGINS_CHROME_PLUGIN_SERVICE_FILTER_H_
 
 #include <map>
 #include <set>
 #include <vector>
@@ skipping 80 matching lines @@
   // (render_process_id == 0)
   bool CanLoadPlugin(int render_process_id,
                      const base::FilePath& path) override;
 
   void NPAPIPluginLoaded(int render_process_id,
                          int render_frame_id,
                          const std::string& mime_type,
                          const content::WebPluginInfo& info) override;
 
  private:
-  friend struct DefaultSingletonTraits<ChromePluginServiceFilter>;
+  friend struct base::DefaultSingletonTraits<ChromePluginServiceFilter>;
 
   struct OverriddenPlugin {
     OverriddenPlugin();
     ~OverriddenPlugin();
 
     int render_frame_id;
     GURL url;  // If empty, the override applies to all urls in render_frame.
     content::WebPluginInfo plugin;
   };
 
@@ skipping 34 matching lines @@
   ResourceContextMap resource_context_map_;
 
   std::map<int, ProcessDetails> plugin_details_;
 
   // Keeps track if loading a plugin has already trigged an infobar.
   // Accessed on UI thread.
   std::set<std::string> infobared_plugin_mime_types_;
 };
 
 #endif  // CHROME_BROWSER_PLUGINS_CHROME_PLUGIN_SERVICE_FILTER_H_