CSS Parser: Implement parseRule

Source/core/css/parser/CSSParserTokenRange.h

 // 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.
 
 #ifndef CSSParserTokenRange_h
 #define CSSParserTokenRange_h
 
 #include "core/css/parser/CSSParserToken.h"
 #include "wtf/Vector.h"
 
@@ skipping 40 matching lines @@
         return result;
     }
 
     const CSSParserToken& consumeIncludingWhitespaceAndComments()
     {
         const CSSParserToken& result = consume();
         consumeWhitespaceAndComments();
         return result;
     }
 
+    // The returned range doesn't include the brackets
+    CSSParserTokenRange consumeBlock();

[Timothy Loh, 2014/12/16 00:01:20]

This is almost the same as consumeComponentValue, except that it's awkward to
find a block's content range using consumeComponentValue (after advancing past a
component value, if the next token is an EOF token we can't tell if the block
ended early)

+
     void consumeComponentValue();
     void consumeWhitespaceAndComments();
 
     static void initStaticEOFToken();
 
 private:
     CSSParserTokenRange(const CSSParserToken* first, const CSSParserToken* last)
     : m_first(first)
     , m_last(last)
     { }
 
     const CSSParserToken* m_first;
     const CSSParserToken* m_last;
 };
 
 } // namespace
 
 #endif // CSSParserTokenRange_h