Fixed MediaQueryTokenizer escape support

Source/core/css/parser/MediaQueryTokenizerTest.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/parser/MediaQueryTokenizer.h"
 
 #include "wtf/PassOwnPtr.h"
 #include <gtest/gtest.h>
 
 namespace WebCore {
 
 typedef struct {
     const char* input;
     const char* output;
 } TestCase;
 
 TEST(MediaQueryTokenizerTest, Basic)
 {
     TestCase testCases[] = {
         { "(max-width: 50px)", "(max-width: 50px)" },
+        { "(max-width: 50\\70\\78)", "(max-width: 50px)" },
         { "(max-width: /* comment */50px)", "(max-width: 50px)" },
         { "(max-width: /** *commen*t */60px)", "(max-width: 60px)" },
         { "(max-width: /** *commen*t **/70px)", "(max-width: 70px)" },
         { "(max-width: /** *commen*t **//**/80px)", "(max-width: 80px)" },
         { "(max-width: /*/ **/90px)", "(max-width: 90px)" },
         { "(max-width: /*/ **/*100px)", "(max-width: *100px)" },
         { "(max-width: 110px/*)", "(max-width: 110px" },
         { "(max-width: 120px)/*", "(max-width: 120px)" },
         { "(max-width: 130px)/**", "(max-width: 130px)" },
         { "(max-width: /***/140px)/**/", "(max-width: 140px)" },
@@ skipping 54 matching lines @@
             testToken(c, EOFToken);
         else if (c > SCHAR_MAX)
             testToken(c, IdentToken);
         else
             testToken(c, DelimiterToken);
     }
     testToken(USHRT_MAX, IdentToken);
 }
 
 } // namespace