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

base/files/file_util_win.cc

Index: base/files/file_util_win.cc
diff --git a/base/files/file_util_win.cc b/base/files/file_util_win.cc
index 294726a8279089098c812fff6c35738d6dd65660..898b99b1d824de39621ce435d913639b61aa6a42 100644
--- a/base/files/file_util_win.cc
+++ b/base/files/file_util_win.cc
@@ -283,6 +283,9 @@ bool GetTempDir(FilePath* path) {
   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.