Revert 31875 to see whether it fixes reliability bot.

base/file_util.cc

Index: base/file_util.cc
===================================================================
--- base/file_util.cc	(revision 32064)
+++ base/file_util.cc	(working copy)
@@ -267,20 +267,6 @@
   CloseHandles();
 }
 
-bool MemoryMappedFile::Initialize(base::PlatformFile file) {
-  if (IsValid())
-    return false;
-
-  file_ = file;
-
-  if (!MapFileToMemoryInternal()) {
-    CloseHandles();
-    return false;
-  }
-
-  return true;
-}
-
 bool MemoryMappedFile::Initialize(const FilePath& file_name) {
   if (IsValid())
     return false;
@@ -293,19 +279,6 @@
   return true;
 }
 
-bool MemoryMappedFile::MapFileToMemory(const FilePath& file_name) {
-  file_ = base::CreatePlatformFile(file_name,
-      base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ,
-      NULL);
-
-  if (file_ == base::kInvalidPlatformFileValue) {
-    LOG(ERROR) << "Couldn't open " << file_name.value();
-    return false;
-  }
-
-  return MapFileToMemoryInternal();
-}
-
 bool MemoryMappedFile::IsValid() {
   return data_ != NULL;
 }