| Index: chrome/browser/chromeos/file_manager/volume_manager_factory.h
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| diff --git a/chrome/browser/chromeos/file_manager/volume_manager_factory.h b/chrome/browser/chromeos/file_manager/volume_manager_factory.h
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| index 7255a516f669b1f7ac4cfa58b994c9519aad465d..7a87d9b58cb040d9e98bdd6def015c68e9601933 100644
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| --- a/chrome/browser/chromeos/file_manager/volume_manager_factory.h
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| +++ b/chrome/browser/chromeos/file_manager/volume_manager_factory.h
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| @@ -8,7 +8,10 @@
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|  #ifndef CHROME_BROWSER_CHROMEOS_FILE_MANAGER_VOLUME_MANAGER_FACTORY_H_
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|  #define CHROME_BROWSER_CHROMEOS_FILE_MANAGER_VOLUME_MANAGER_FACTORY_H_
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|  
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| -template<typename T> struct DefaultSingletonTraits;
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| +namespace base {
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| +template <typename T>
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| +struct DefaultSingletonTraits;
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| +}  // namespace base
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|  
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|  namespace content {
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|  class BrowserContext;
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| @@ -39,7 +42,7 @@ class VolumeManagerFactory : public BrowserContextKeyedServiceFactory {
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|  
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|   private:
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|    // For Singleton.
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| -  friend struct DefaultSingletonTraits<VolumeManagerFactory>;
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| +  friend struct base::DefaultSingletonTraits<VolumeManagerFactory>;
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|  
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|    VolumeManagerFactory();
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|    ~VolumeManagerFactory() override;
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| 
 |