Revert 51231 - Loosen permission on extension temp dir when a flag is used....

base/file_util_posix.cc

Index: base/file_util_posix.cc
===================================================================
--- base/file_util_posix.cc	(revision 51236)
+++ base/file_util_posix.cc	(working copy)
@@ -428,15 +428,7 @@
 
 bool CreateTemporaryDirInDir(const FilePath& base_dir,
                              const FilePath::StringType& prefix,
-                             FilePath* new_dir,
-                             bool loosen_permissions) {
-  // To understand crbug/35198, the ability to call this
-  // this function on windows while giving loose permissions
-  // to the resulting directory has been temporarily added.
-  // It should not be posible to call this function with
-  // loosen_permissions == true on non-windows plarforms.
-  CHECK(!loosen_permissions);
-
+                             FilePath* new_dir) {
   FilePath::StringType mkdtemp_template = prefix;
   mkdtemp_template.append(FILE_PATH_LITERAL("XXXXXX"));
   return CreateTemporaryDirInDirImpl(base_dir, mkdtemp_template, new_dir);