base: Move MemoryMappedFile out of file_util.h and into its own header file.

chrome/renderer/spellchecker/hunspell_engine.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 CHROME_RENDERER_SPELLCHECKER_HUNSPELL_ENGINE_H_
 #define CHROME_RENDERER_SPELLCHECKER_HUNSPELL_ENGINE_H_
 
-#include "base/file_util.h"
+#include <string>
+#include <vector>
+
 #include "base/memory/scoped_ptr.h"
 #include "base/string16.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/common/spellcheck_common.h"
 #include "chrome/renderer/spellchecker/spelling_engine.h"
 
-#include <string>
-#include <vector>
+class Hunspell;
 
-class Hunspell;
+namespace base {
+class MemoryMappedFile;
+}
 
 class HunspellEngine : public SpellingEngine {
  public:
   HunspellEngine();
   virtual ~HunspellEngine();
 
   virtual void Init(base::PlatformFile file) OVERRIDE;
 
   virtual bool InitializeIfNeeded() OVERRIDE;
   virtual bool IsEnabled() OVERRIDE;
   virtual bool CheckSpelling(const string16& word_to_check, int tag) OVERRIDE;
   virtual void FillSuggestionList(const string16& wrong_word,
                           std::vector<string16>* optional_suggestions) OVERRIDE;
 
  private:
   // Initializes the Hunspell dictionary, or does nothing if |hunspell_| is
   // non-null. This blocks.
   void InitializeHunspell();
 
   // We memory-map the BDict file.
-  scoped_ptr<file_util::MemoryMappedFile> bdict_file_;
+  scoped_ptr<base::MemoryMappedFile> bdict_file_;
 
   // The hunspell dictionary in use.
   scoped_ptr<Hunspell> hunspell_;
 
   base::PlatformFile file_;
 
   // This flags is true if we have been initialized.
   // The value indicates whether we should request a
   // dictionary from the browser when the render view asks us to check the
   // spelling of a word.
   bool initialized_;
 
   // This flags is true if we have requested dictionary.
   bool dictionary_requested_;
-
 };
 
 #endif  // CHROME_RENDERER_SPELLCHECKER_HUNSPELL_ENGINE_H_
-