Remove base::kInvalidPlatformFileValue from Chrome

chrome/browser/spellchecker/spellcheck_hunspell_dictionary.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_BROWSER_SPELLCHECKER_SPELLCHECK_HUNSPELL_DICTIONARY_H_
 #define CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_HUNSPELL_DICTIONARY_H_
 
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/move.h"
 #include "base/observer_list.h"
-#include "base/platform_file.h"
 #include "chrome/browser/spellchecker/spellcheck_dictionary.h"
 #include "net/url_request/url_fetcher_delegate.h"
 
 class GURL;
 class SpellcheckService;
 
 namespace net {
 class URLFetcher;
 class URLRequestContextGetter;
 }  // namespace net
@@ skipping 29 matching lines @@
   // SpellcheckDictionary implementation:
   virtual void Load() OVERRIDE;
 
   // Retry downloading |dictionary_file_|.
   void RetryDownloadDictionary(
       net::URLRequestContextGetter* request_context_getter);
 
   // Returns true if the dictionary is ready to use.
   virtual bool IsReady() const;
 
-  // TODO(rlp): Return by value.
-  base::PlatformFile GetDictionaryFile() const;
+  const base::File& GetDictionaryFile() const;
   const std::string& GetLanguage() const;
   bool IsUsingPlatformChecker() const;
 
   // Add an observer for Hunspell dictionary events.
   void AddObserver(Observer* observer);
 
   // Remove an observer for Hunspell dictionary events.
   void RemoveObserver(Observer* observer);
 
   // Whether dictionary is being downloaded.
@@ skipping 83 matching lines @@
 
   // Dictionary file path and descriptor.
   DictionaryFile dictionary_file_;
 
   base::WeakPtrFactory<SpellcheckHunspellDictionary> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SpellcheckHunspellDictionary);
 };
 
 #endif  // CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_HUNSPELL_DICTIONARY_H_