Move Singleton and related structs to namespace base

content/renderer/media/webrtc_uma_histograms.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 CONTENT_RENDERER_MEDIA_WEBRTC_UMA_HISTOGRAMS_H_
 #define CONTENT_RENDERER_MEDIA_WEBRTC_UMA_HISTOGRAMS_H_
 
 #include "base/memory/singleton.h"
 #include "base/threading/non_thread_safe.h"
 #include "content/common/content_export.h"
@@ skipping 55 matching lines @@
   virtual ~PerSessionWebRTCAPIMetrics();
 
   static PerSessionWebRTCAPIMetrics* GetInstance();
 
   // Increment/decrement the number of streams being sent or received
   // over any current PeerConnection.
   void IncrementStreamCounter();
   void DecrementStreamCounter();
 
  protected:
-  friend struct DefaultSingletonTraits<PerSessionWebRTCAPIMetrics>;
+  friend struct base::DefaultSingletonTraits<PerSessionWebRTCAPIMetrics>;
   friend void UpdateWebRTCMethodCount(JavaScriptAPIName);
 
   // Protected so that unit tests can test without this being a
   // singleton.
   PerSessionWebRTCAPIMetrics();
 
   // Overridable by unit tests.
   virtual void LogUsage(JavaScriptAPIName api_name);
 
   // Called by UpdateWebRTCMethodCount above. Protected rather than
   // private so that unit tests can call it.
   void LogUsageOnlyOnce(JavaScriptAPIName api_name);
 
  private:
   void ResetUsage();
 
   int num_streams_;
   bool has_used_api_[INVALID_NAME];
 
   DISALLOW_COPY_AND_ASSIGN(PerSessionWebRTCAPIMetrics);
 };
 
 } //  namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBRTC_UMA_HISTOGRAMS_H_