Replace CSSParserString with StringView.

third_party/WebKit/Source/core/css/parser/CSSTokenizerInputStream.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 CSSTokenizerInputStream_h
 #define CSSTokenizerInputStream_h
 
+#include "wtf/text/StringView.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
-struct CSSParserString;
-
 class CSSTokenizerInputStream {
     WTF_MAKE_NONCOPYABLE(CSSTokenizerInputStream);
     USING_FAST_MALLOC(CSSTokenizerInputStream);
 public:
     CSSTokenizerInputStream(String input);
 
     UChar peek(unsigned);
     inline UChar nextInputChar()
     {
         return peek(0);
@@ skipping 15 matching lines @@
 
     template<bool characterPredicate(UChar)>
     unsigned skipWhilePredicate(unsigned offset)
     {
         while ((m_offset + offset) < m_stringLength && characterPredicate((*m_string)[m_offset + offset]))
             ++offset;
         return offset;
     }
 
     unsigned offset() const { return std::min(m_offset, m_stringLength); }
-    CSSParserString rangeAsCSSParserString(unsigned start, unsigned length) const;
+    StringView rangeAt(unsigned start, unsigned length) const;
 
 private:
     size_t m_offset;
     const size_t m_stringLength;
     const RefPtr<StringImpl> m_string;
 };
 
 } // namespace blink
 
 #endif // CSSTokenizerInputStream_h