Include trailing '\' when iterating over path in reparse points search.

sandbox/win/src/win_utils.cc

 // Copyright (c) 2011 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 "sandbox/win/src/win_utils.h"
 
 #include <map>
 
 #include "base/memory/scoped_ptr.h"
 #include "sandbox/win/src/internal_types.h"
@@ skipping 96 matching lines @@
         NOTREACHED_NT();
         return error;
       }
     } else if (FILE_ATTRIBUTE_REPARSE_POINT & attributes) {
       // This is a reparse point.
       *result = true;
       return ERROR_SUCCESS;
     }
 
     last_pos = path.rfind(L'\\');
-  } while (last_pos != base::string16::npos);
+  } while (last_pos > 2);  // Skip root dir.
 
   *result = false;
   return ERROR_SUCCESS;
 }
 
 // We get a |full_path| of the form \??\c:\some\foo\bar, and the name that
 // we'll get from |handle| will be \device\harddiskvolume1\some\foo\bar.
 bool SameObject(HANDLE handle, const wchar_t* full_path) {
   base::string16 path(full_path);
   DCHECK_NT(!path.empty());
@@ skipping 187 matching lines @@
 
   for (int tries = 1; !(*function_ptr) && tries < max_tries; ++tries) {
     if (tries >= sleep_threshold)
       ::Sleep(1);
     ntdll = ::GetModuleHandle(sandbox::kNtdllName);
     *function_ptr = ::GetProcAddress(ntdll, name);
   }
 
   CHECK_NT(*function_ptr);
 }