CSS Tokenizer: Consume a single whitespace after escapes if present

Source/core/css/parser/CSSTokenizerTest.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/CSSTokenizer.h"
 
 #include "core/css/parser/MediaQueryBlockWatcher.h"
 #include "wtf/PassOwnPtr.h"
 #include <gtest/gtest.h>
@@ skipping 44 matching lines @@
         { "(max-aspect-ratio: +-5)", "(max-aspect-ratio: '+'-5)" },
         { "(max-aspect-ratio: +bla5)", "(max-aspect-ratio: '+'bla5)" },
         { "(max-aspect-ratio: +5bla)", "(max-aspect-ratio: 5other)" },
         { "(max-aspect-ratio: -bla)", "(max-aspect-ratio: -bla)" },
         { "(max-aspect-ratio: --bla)", "(max-aspect-ratio: '-'-bla)" },
         { "5e0", "5.000000" },
         { "5.0", "5.000000" },
         { "5.", "5'.'" },
         { "5.0e-1", "0.500000" },
         { "5.e-1", "5'.'e-1" },
+        { "hel\\6co", "hello" },
+        { "wor\\6c d", "world" },
+        { "wor\\6c\r\nd wor\\6c\n\rd", "world worl d" },
+        { "cod\\65point esca\\70\fe \\74\test", "codepoint escape test" },
+        { "esca\\70\f\te \\74 \nest", "escap e t est" },
         { 0, 0 } // Do not remove the terminator line.
     };
 
     for (int i = 0; testCases[i].input; ++i) {
         Vector<CSSParserToken> tokens;
         CSSTokenizer::tokenize(testCases[i].input, tokens);
         StringBuilder output;
         for (size_t j = 0; j < tokens.size(); ++j)
             output.append(tokens[j].textForUnitTests());
         ASSERT_STREQ(testCases[i].output, output.toString().ascii().data());
@@ skipping 94 matching lines @@
             testToken(c, EOFToken);
         else if (c > SCHAR_MAX)
             testToken(c, IdentToken);
         else
             testToken(c, DelimiterToken);
     }
     testToken(USHRT_MAX, IdentToken);
 }
 
 } // namespace