FBTF: Even more ctor/virtual deinlining.

chrome/browser/extensions/file_reader.h

 // Copyright (c) 2009 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_EXTENSIONS_FILE_READER_H_
 #define CHROME_BROWSER_EXTENSIONS_FILE_READER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 14 matching lines @@
 
   FileReader(const ExtensionResource& resource, Callback* callback);
 
   // Called to start reading the file on a background thread.  Upon completion,
   // the callback will be notified of the results.
   void Start();
 
  private:
   friend class base::RefCountedThreadSafe<FileReader>;
 
-  ~FileReader() {}
+  virtual ~FileReader();
 
   void ReadFileOnBackgroundThread();
   void RunCallback(bool success, const std::string& data);
 
   ExtensionResource resource_;
   Callback* callback_;
   MessageLoop* origin_loop_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_FILE_READER_H_