clang/win: Fix most -Wwriteable-strings warnings.

base/test/test_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/test/test_file_util.h"
 
 #include <windows.h>
 #include <aclapi.h>
 #include <shlwapi.h>
 
@@ skipping 29 matching lines @@
   }
 
   EXPLICIT_ACCESS change;
   change.grfAccessPermissions = permission;
   change.grfAccessMode = DENY_ACCESS;
   change.grfInheritance = 0;
   change.Trustee.pMultipleTrustee = NULL;
   change.Trustee.MultipleTrusteeOperation = NO_MULTIPLE_TRUSTEE;
   change.Trustee.TrusteeForm = TRUSTEE_IS_NAME;
   change.Trustee.TrusteeType = TRUSTEE_IS_USER;
-  change.Trustee.ptstrName = L"CURRENT_USER";
+  change.Trustee.ptstrName = const_cast<wchar_t*>(L"CURRENT_USER");
 
   PACL new_dacl;
   if (SetEntriesInAcl(1, &change, old_dacl, &new_dacl) != ERROR_SUCCESS) {
     LocalFree(security_descriptor);
     return false;
   }
 
   DWORD rc = SetNamedSecurityInfo(const_cast<wchar_t*>(path.value().c_str()),
                                   SE_FILE_OBJECT, DACL_SECURITY_INFORMATION,
                                   NULL, NULL, new_dacl, NULL);
@@ skipping 227 matching lines @@
   DCHECK(info_ != NULL);
   DCHECK_NE(0u, length_);
 }
 
 PermissionRestorer::~PermissionRestorer() {
   if (!RestorePermissionInfo(path_, info_, length_))
     NOTREACHED();
 }
 
 }  // namespace file_util