Implement CSS.escape

Source/core/css/parser/CSSParserToken.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/CSSParserToken.h"
 
 #include "core/css/CSSMarkup.h"
 #include "core/css/parser/CSSPropertyParser.h"
 #include "wtf/HashMap.h"
@@ skipping 98 matching lines @@
     ASSERT(m_type == IdentToken);
     return unresolvedCSSPropertyID(value());
 }
 
 void CSSParserToken::serialize(StringBuilder& builder) const
 {
     // This is currently only used for @supports CSSOM. To keep our implementation
     // simple we handle some of the edge cases incorrectly (see comments below).
     switch (type()) {
     case IdentToken:
-        return serializeIdentifier(value(), builder);
+        serializeIdentifier(value(), builder);
+        break;
     case FunctionToken:
         serializeIdentifier(value(), builder);
         return builder.append('(');
     case AtKeywordToken:
         builder.append('@');
-        return serializeIdentifier(value(), builder);
+        serializeIdentifier(value(), builder);
+        break;
     case HashToken:
         // This will always serialize as a hash-token with 'id' type instead of
         // preserving the type of the input.
         builder.append('#');
-        return serializeIdentifier(value(), builder);
+        serializeIdentifier(value(), builder);
+        break;
     case UrlToken:
         builder.append("url(");
         serializeIdentifier(value(), builder);
         return builder.append(")");
     case DelimiterToken:
         if (delimiter() == '\\')
             return builder.append("\\\n");
         return builder.append(delimiter());
     case NumberToken:
         // These won't properly preserve the NumericValueType flag
         return builder.appendNumber(numericValue());
     case PercentageToken:
         builder.appendNumber(numericValue());
         return builder.append('%');
     case DimensionToken:
         // This will incorrectly serialize e.g. 4e3e2 as 4000e2
         builder.appendNumber(numericValue());
-        return serializeIdentifier(value(), builder);
+        serializeIdentifier(value(), builder);
+        break;
     case UnicodeRangeToken:
         return builder.append(String::format("U+%X-%X", unicodeRangeStart(), unicodeRangeEnd()));
     case StringToken:
         return serializeString(value(), builder);
 
     case IncludeMatchToken:
         return builder.append("~=");
     case DashMatchToken:
         return builder.append("|=");
     case PrefixMatchToken:
@@ skipping 34 matching lines @@
         return builder.append('}');
 
     case EOFToken:
     case CommentToken:
         ASSERT_NOT_REACHED();
         return;
     }
 }
 
 } // namespace blink