Change a bool type to an enum type in constructor argument of SpaceSplitString.

Source/core/dom/SandboxFlags.cpp

 /*
  * Copyright (C) 2013 Google Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 16 matching lines @@
 #include "config.h"
 #include "core/dom/SandboxFlags.h"
 
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "wtf/text/StringBuilder.h"
 
 namespace blink {
 
 SandboxFlags parseSandboxPolicy(const String& policy, String& invalidTokensErrorMessage)
 {
-    const bool shouldFoldCase = false;
-    SpaceSplitString policyTokens(AtomicString(policy), shouldFoldCase);
+    SpaceSplitString policyTokens(AtomicString(policy), SpaceSplitString::ShouldNotFoldCase);
     return parseSandboxPolicy(policyTokens, invalidTokensErrorMessage);
 }
 
 SandboxFlags parseSandboxPolicy(const SpaceSplitString& policy, String& invalidTokensErrorMessage)
 {
     // http://www.w3.org/TR/html5/the-iframe-element.html#attr-iframe-sandbox
     // Parse the unordered set of unique space-separated tokens.
     SandboxFlags flags = SandboxAll;
     unsigned length = policy.size();
     unsigned numberOfTokenErrors = 0;
@@ skipping 33 matching lines @@
             tokenErrors.appendLiteral(" are invalid sandbox flags.");
         else
             tokenErrors.appendLiteral(" is an invalid sandbox flag.");
         invalidTokensErrorMessage = tokenErrors.toString();
     }
 
     return flags;
 }
 
 }