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

chrome/renderer/spellchecker/hunspell_engine.h

Index: chrome/renderer/spellchecker/hunspell_engine.h
diff --git a/chrome/renderer/spellchecker/hunspell_engine.h b/chrome/renderer/spellchecker/hunspell_engine.h
index 26d3a39ce14fae3cfd461454afe834c52633c8e5..bbc9fb4cad81f5f860cd146ab33748768344a82c 100644
--- a/chrome/renderer/spellchecker/hunspell_engine.h
+++ b/chrome/renderer/spellchecker/hunspell_engine.h
@@ -5,18 +5,21 @@
 #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;
 
+namespace base {
+class MemoryMappedFile;
+}
+
 class HunspellEngine : public SpellingEngine {
  public:
   HunspellEngine();
@@ -36,7 +39,7 @@ class HunspellEngine : public SpellingEngine {
   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_;
@@ -51,8 +54,6 @@ class HunspellEngine : public SpellingEngine {
 
   // This flags is true if we have requested dictionary.
   bool dictionary_requested_;
-
 };
 
 #endif  // CHROME_RENDERER_SPELLCHECKER_HUNSPELL_ENGINE_H_
-