Move Singleton and related structs to namespace base

chromeos/accelerometer/accelerometer_reader.h

 // Copyright 2014 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 CHROMEOS_ACCELEROMETER_ACCELEROMETER_READER_H_
 #define CHROMEOS_ACCELEROMETER_ACCELEROMETER_READER_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/observer_list_threadsafe.h"
 #include "chromeos/accelerometer/accelerometer_types.h"
 #include "chromeos/chromeos_export.h"
 
+namespace base {
 template <typename T>
 struct DefaultSingletonTraits;
 
-namespace base {
 class SequencedTaskRunner;
 }
 
 namespace chromeos {
 
 class AccelerometerFileReader;
 
 // Reads an accelerometer device and reports data back to an
 // AccelerometerDelegate.
 class CHROMEOS_EXPORT AccelerometerReader {
@@ skipping 18 matching lines @@
 
   // Add/Remove observers.
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
  protected:
   AccelerometerReader();
   virtual ~AccelerometerReader();
 
  private:
-  friend struct DefaultSingletonTraits<AccelerometerReader>;
+  friend struct base::DefaultSingletonTraits<AccelerometerReader>;
 
   // Worker that will run on the base::SequencedTaskRunner provided to
   // Initialize. It will determine accelerometer configuration, read the data,
   // and notify observers.
   scoped_refptr<AccelerometerFileReader> accelerometer_file_reader_;
 
   DISALLOW_COPY_AND_ASSIGN(AccelerometerReader);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_ACCELEROMETER_ACCELEROMETER_READER_H_