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

base/file_util.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 "base/file_util.h"
 
 #if defined(OS_WIN)
 #include <io.h>
 #endif
 #include <stdio.h>
@@ skipping 333 matching lines @@
     LARGE_INTEGER li = { info.nFileSizeLow, info.nFileSizeHigh };
     running_size += li.QuadPart;
 #else
     running_size += info.stat.st_size;
 #endif
   }
   return running_size;
 }
 
 ///////////////////////////////////////////////
-// MemoryMappedFile
-
-MemoryMappedFile::~MemoryMappedFile() {
-  CloseHandles();
-}
-
-bool MemoryMappedFile::Initialize(const FilePath& file_name) {
-  if (IsValid())
-    return false;
-
-  if (!MapFileToMemory(file_name)) {
-    CloseHandles();
-    return false;
-  }
-
-  return true;
-}
-
-bool MemoryMappedFile::Initialize(base::PlatformFile file) {
-  if (IsValid())
-    return false;
-
-  file_ = file;
-
-  if (!MapFileToMemoryInternal()) {
-    CloseHandles();
-    return false;
-  }
-
-  return true;
-}
-
-bool MemoryMappedFile::IsValid() const {
-  return data_ != NULL;
-}
-
-bool MemoryMappedFile::MapFileToMemory(const FilePath& file_name) {
-  file_ = base::CreatePlatformFile(
-      file_name, base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ,
-      NULL, NULL);
-
-  if (file_ == base::kInvalidPlatformFileValue) {
-    DLOG(ERROR) << "Couldn't open " << file_name.value();
-    return false;
-  }
-
-  return MapFileToMemoryInternal();
-}
-
-///////////////////////////////////////////////
 // FileEnumerator
 //
 // Note: the main logic is in file_util_<platform>.cc
 
 bool FileEnumerator::ShouldSkip(const FilePath& path) {
   FilePath::StringType basename = path.BaseName().value();
   return IsDot(path) || (IsDotDot(path) && !(INCLUDE_DOT_DOT & file_type_));
 }
 
 }  // namespace