Require explicit selection of traits for LazyInstance

storage/browser/fileapi/isolated_context.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 STORAGE_BROWSER_FILEAPI_ISOLATED_CONTEXT_H_
 #define STORAGE_BROWSER_FILEAPI_ISOLATED_CONTEXT_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 143 matching lines @@
   FileSystemURL CrackURL(const GURL& url) const override;
   FileSystemURL CreateCrackedFileSystemURL(
       const GURL& origin,
       FileSystemType type,
       const base::FilePath& path) const override;
 
   // Returns the virtual root path that looks like /<filesystem_id>.
   base::FilePath CreateVirtualRootPath(const std::string& filesystem_id) const;
 
  private:
-  friend struct base::DefaultLazyInstanceTraits<IsolatedContext>;
+  friend struct base::LazyInstanceTraitsBase<IsolatedContext>;
 
   // Represents each file system instance (defined in the .cc).
   class Instance;
 
   // Obtain an instance of this class via GetInstance().
   IsolatedContext();
   ~IsolatedContext() override;
 
   // MountPoints overrides.
   FileSystemURL CrackFileSystemURL(const FileSystemURL& url) const override;
@@ skipping 12 matching lines @@
 
   // Reverse map from registered path to IDs.
   std::map<base::FilePath, std::set<std::string>> path_to_id_map_;
 
   DISALLOW_COPY_AND_ASSIGN(IsolatedContext);
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_BROWSER_FILEAPI_ISOLATED_CONTEXT_H_