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

content/renderer/hyphenator/hyphenator.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 CONTENT_RENDERER_HYPHENATOR_HYPHENATOR_H_
 #define CONTENT_RENDERER_HYPHENATOR_HYPHENATOR_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/platform_file.h"
 #include "base/string16.h"
 #include "content/common/content_export.h"
 #include "content/public/renderer/render_process_observer.h"
 #include "ipc/ipc_platform_file.h"
 
-namespace file_util {
+namespace base {
 class MemoryMappedFile;
 }
 
 typedef struct _HyphenDict HyphenDict;
 
 namespace content {
 class RenderThread;
 
 // A class that hyphenates a word. This class encapsulates the hyphen library
 // and manages resources used by the library. When this class uses a huge
@@ skipping 28 matching lines @@
   void OnSetDictionary(IPC::PlatformFileForTransit rule_file);
 
   // The dictionary used by the hyphen library.
   HyphenDict* dictionary_;
 
   // The dictionary file and its memory-mapping object. (Our copy of the hyphen
   // library uses a memory-mapped file opened by a browser so renderers can use
   // it without opening the file.)
   string16 locale_;
   base::PlatformFile rule_file_;
-  scoped_ptr<file_util::MemoryMappedFile> rule_map_;
+  scoped_ptr<base::MemoryMappedFile> rule_map_;
 
   // A cached result. WebKit often calls ComputeLastHyphenLocation with the same
   // word multiple times to find the best hyphenation point when it finds a line
   // break. On the other hand, the hyphen library returns all hyphenation points
   // for a word. This class caches the hyphenation points returned by the hyphen
   // library to avoid calling the library multiple times.
   string16 word_;
   bool result_;
   std::vector<int> hyphen_offsets_;
 
   DISALLOW_COPY_AND_ASSIGN(Hyphenator);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_HYPHENATOR_HYPHENATOR_H_