CSS Tokenizer: Add an on-stack tokenizer scope

Source/core/css/parser/MediaConditionTest.cpp

 // Copyright 2014 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 "config.h"
 
 #include "core/css/MediaList.h"
 #include "core/css/MediaQuery.h"
 #include "core/css/parser/CSSTokenizer.h"
 #include "core/css/parser/MediaQueryParser.h"
@@ skipping 23 matching lines @@
         {"(min-width: 100px) and print", "not all"},
         {"(min-width: 100px) and (max-width: 900px)", "(max-width: 900px) and (min-width: 100px)"},
         {"(min-width: [100px) and (max-width: 900px)", "not all"},
         {"not (min-width: 900px)", "not all and (min-width: 900px)"},
         {"not (blabla)", "not all"},
         {0, 0} // Do not remove the terminator line.
     };
 
     // FIXME: We should test comma-seperated media conditions
     for (unsigned i = 0; testCases[i].input; ++i) {
-        Vector<CSSParserToken> tokens;
-        CSSTokenizer::tokenize(testCases[i].input, tokens);
-        RefPtrWillBeRawPtr<MediaQuerySet> mediaConditionQuerySet = MediaQueryParser::parseMediaCondition(CSSParserTokenRange(tokens));
+        CSSTokenizer::Scope scope(testCases[i].input);
+        RefPtrWillBeRawPtr<MediaQuerySet> mediaConditionQuerySet = MediaQueryParser::parseMediaCondition(scope.tokenRange());
         ASSERT_EQ(mediaConditionQuerySet->queryVector().size(), (unsigned)1);
         String queryText = mediaConditionQuerySet->queryVector()[0]->cssText();
         ASSERT_STREQ(testCases[i].output, queryText.ascii().data());
     }
 }
 
 } // namespace