Remove base::kInvalidPlatformFileValue from Chrome

chrome/browser/spellchecker/spellcheck_hunspell_dictionary.cc

 // 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.
 
 #include "chrome/browser/spellchecker/spellcheck_hunspell_dictionary.h"
 
 #include "base/file_util.h"
 #include "base/files/memory_mapped_file.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 120 matching lines @@
 }
 
 void SpellcheckHunspellDictionary::RetryDownloadDictionary(
       net::URLRequestContextGetter* request_context_getter) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   request_context_getter_ = request_context_getter;
   DownloadDictionary(GetDictionaryURL());
 }
 
 bool SpellcheckHunspellDictionary::IsReady() const {
-  return GetDictionaryFile() !=
-      base::kInvalidPlatformFileValue || IsUsingPlatformChecker();
+  return GetDictionaryFile().IsValid() || IsUsingPlatformChecker();
 }
 
-base::PlatformFile SpellcheckHunspellDictionary::GetDictionaryFile() const {
-  return dictionary_file_.file.GetPlatformFile();
+const base::File& SpellcheckHunspellDictionary::GetDictionaryFile() const {
+  return dictionary_file_.file;
 }
 
 const std::string& SpellcheckHunspellDictionary::GetLanguage() const {
   return language_;
 }
 
 bool SpellcheckHunspellDictionary::IsUsingPlatformChecker() const {
   return use_platform_spellchecker_;
 }
 
@@ skipping 192 matching lines @@
 void SpellcheckHunspellDictionary::InformListenersOfInitialization() {
   FOR_EACH_OBSERVER(Observer, observers_, OnHunspellDictionaryInitialized());
 }
 
 void SpellcheckHunspellDictionary::InformListenersOfDownloadFailure() {
   download_status_ = DOWNLOAD_FAILED;
   FOR_EACH_OBSERVER(Observer,
                     observers_,
                     OnHunspellDictionaryDownloadFailure());
 }