[DO NOT COMMIT][Offline Pages] Moving Offline Page Cache to cache directory.

base/files/file_util_win.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/files/file_util.h"
 
 #include <windows.h>
 #include <io.h>
 #include <psapi.h>
 #include <shellapi.h>
@@ skipping 265 matching lines @@
   if (fileattr != INVALID_FILE_ATTRIBUTES)
     return (fileattr & FILE_ATTRIBUTE_DIRECTORY) != 0;
   return false;
 }
 
 bool GetTempDir(FilePath* path) {
   wchar_t temp_path[MAX_PATH + 1];
   DWORD path_len = ::GetTempPath(MAX_PATH, temp_path);
   if (path_len >= MAX_PATH || path_len <= 0)
     return false;
+  DWORD long_path_len = ::GetLongPathName(temp_path, temp_path, MAX_PATH);
+  if (long_path_len >= MAX_PATH || long_path_len <= 0)
+    return false;
   // TODO(evanm): the old behavior of this function was to always strip the
   // trailing slash.  We duplicate this here, but it shouldn't be necessary
   // when everyone is using the appropriate FilePath APIs.
   *path = FilePath(temp_path).StripTrailingSeparators();
   return true;
 }
 
 FilePath GetHomeDir() {
   char16 result[MAX_PATH];
   if (SUCCEEDED(SHGetFolderPath(NULL, CSIDL_PROFILE, NULL, SHGFP_TYPE_CURRENT,
@@ skipping 569 matching lines @@
     // Like Move, this function is not transactional, so we just
     // leave the copied bits behind if deleting from_path fails.
     // If to_path exists previously then we have already overwritten
     // it by now, we don't get better off by deleting the new bits.
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace base