Revert 64960 - Turn on file access checks on Win....

base/platform_file_win.cc

 // Copyright (c) 2006-2008 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/platform_file.h"
 
 #include "base/file_path.h"
 #include "base/logging.h"
-#include "base/thread_restrictions.h"
 
 namespace base {
 
 PlatformFile CreatePlatformFile(const FilePath& name,
                                 int flags,
                                 bool* created,
                                 PlatformFileError* error_code) {
-  base::ThreadRestrictions::AssertIOAllowed();
-
   DWORD disposition = 0;
 
   if (flags & PLATFORM_FILE_OPEN)
     disposition = OPEN_EXISTING;
 
   if (flags & PLATFORM_FILE_CREATE) {
     DCHECK(!disposition);
     disposition = CREATE_NEW;
   }
 
@@ skipping 75 matching lines @@
   return file;
 }
 
 PlatformFile CreatePlatformFile(const std::wstring& name, int flags,
                                 bool* created) {
   return CreatePlatformFile(FilePath::FromWStringHack(name), flags,
                             created, NULL);
 }
 
 bool ClosePlatformFile(PlatformFile file) {
-  base::ThreadRestrictions::AssertIOAllowed();
   return (CloseHandle(file) != 0);
 }
 
 int ReadPlatformFile(PlatformFile file, int64 offset, char* data, int size) {
-  base::ThreadRestrictions::AssertIOAllowed();
   if (file == kInvalidPlatformFileValue)
     return -1;
 
   LARGE_INTEGER offset_li;
   offset_li.QuadPart = offset;
 
   OVERLAPPED overlapped = {0};
   overlapped.Offset = offset_li.LowPart;
   overlapped.OffsetHigh = offset_li.HighPart;
 
   DWORD bytes_read;
   if (::ReadFile(file, data, size, &bytes_read, &overlapped) != 0)
     return bytes_read;
   else if (ERROR_HANDLE_EOF == GetLastError())
     return 0;
 
   return -1;
 }
 
 int WritePlatformFile(PlatformFile file, int64 offset,
                       const char* data, int size) {
-  base::ThreadRestrictions::AssertIOAllowed();
   if (file == kInvalidPlatformFileValue)
     return -1;
 
   LARGE_INTEGER offset_li;
   offset_li.QuadPart = offset;
 
   OVERLAPPED overlapped = {0};
   overlapped.Offset = offset_li.LowPart;
   overlapped.OffsetHigh = offset_li.HighPart;
 
   DWORD bytes_written;
   if (::WriteFile(file, data, size, &bytes_written, &overlapped) != 0)
     return bytes_written;
 
   return -1;
 }
 
 bool TruncatePlatformFile(PlatformFile file, int64 length) {
-  base::ThreadRestrictions::AssertIOAllowed();
   if (file == kInvalidPlatformFileValue)
     return false;
 
   // Get the current file pointer.
   LARGE_INTEGER file_pointer;
   LARGE_INTEGER zero;
   zero.QuadPart = 0;
   if (::SetFilePointerEx(file, zero, &file_pointer, FILE_CURRENT) == 0)
     return false;
 
   LARGE_INTEGER length_li;
   length_li.QuadPart = length;
   // If length > file size, SetFilePointerEx() should extend the file
   // with zeroes on all Windows standard file systems (NTFS, FATxx).
   if (!::SetFilePointerEx(file, length_li, NULL, FILE_BEGIN))
     return false;
 
   // Set the new file length and move the file pointer to its old position.
   // This is consistent with ftruncate()'s behavior, even when the file
   // pointer points to a location beyond the end of the file.
   return ((::SetEndOfFile(file) != 0) &&
           (::SetFilePointerEx(file, file_pointer, NULL, FILE_BEGIN) != 0));
 }
 
 bool FlushPlatformFile(PlatformFile file) {
-  base::ThreadRestrictions::AssertIOAllowed();
   return ((file != kInvalidPlatformFileValue) && ::FlushFileBuffers(file));
 }
 
 bool TouchPlatformFile(PlatformFile file, const base::Time& last_access_time,
                        const base::Time& last_modified_time) {
-  base::ThreadRestrictions::AssertIOAllowed();
   if (file == kInvalidPlatformFileValue)
     return false;
 
   FILETIME last_access_filetime = last_access_time.ToFileTime();
   FILETIME last_modified_filetime = last_modified_time.ToFileTime();
   return (::SetFileTime(file, NULL, &last_access_filetime,
                         &last_modified_filetime) != 0);
 }
 
 bool GetPlatformFileInfo(PlatformFile file, PlatformFileInfo* info) {
-  base::ThreadRestrictions::AssertIOAllowed();
   if (!info)
     return false;
 
   BY_HANDLE_FILE_INFORMATION file_info;
   if (GetFileInformationByHandle(file, &file_info) == 0)
     return false;
 
   LARGE_INTEGER size;
   size.HighPart = file_info.nFileSizeHigh;
   size.LowPart = file_info.nFileSizeLow;
   info->size = size.QuadPart;
   info->is_directory =
       file_info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY != 0;
   info->last_modified = base::Time::FromFileTime(file_info.ftLastWriteTime);
   info->last_accessed = base::Time::FromFileTime(file_info.ftLastAccessTime);
   info->creation_time = base::Time::FromFileTime(file_info.ftCreationTime);
   return true;
 }
 
 }  // namespace disk_cache