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

chrome/renderer/spellchecker/hunspell_engine.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 "hunspell_engine.h"
+#include "chrome/renderer/spellchecker/hunspell_engine.h"
 
 #include <algorithm>
 #include <iterator>
 
+#include "base/files/memory_mapped_file.h"
 #include "base/metrics/histogram.h"
 #include "base/time.h"
 #include "chrome/common/spellcheck_common.h"
 #include "chrome/common/spellcheck_messages.h"
 #include "content/public/renderer/render_thread.h"
 #include "third_party/hunspell/src/hunspell/hunspell.hxx"
 
 using base::TimeTicks;
 using content::RenderThread;
 
@@ skipping 31 matching lines @@
   hunspell_.reset();
   bdict_file_.reset();
   file_ = file;
   // Delay the actual initialization of hunspell until it is needed.
 }
 
 void HunspellEngine::InitializeHunspell() {
   if (hunspell_.get())
     return;
 
-  bdict_file_.reset(new file_util::MemoryMappedFile);
+  bdict_file_.reset(new base::MemoryMappedFile);
 
   if (bdict_file_->Initialize(file_)) {
     TimeTicks debug_start_time = base::Histogram::DebugNow();
 
     hunspell_.reset(
         new Hunspell(bdict_file_->data(), bdict_file_->length()));
 
     DHISTOGRAM_TIMES("Spellcheck.InitTime",
                      base::Histogram::DebugNow() - debug_start_time);
   } else {
@@ skipping 60 matching lines @@
   // Don't initialize if hunspell is disabled.
   if (file_ != base::kInvalidPlatformFileValue)
     InitializeHunspell();
 
   return !initialized_;
 }
 
 bool HunspellEngine::IsEnabled() {
   return file_ != base::kInvalidPlatformFileValue;
 }