Replace CSSParserString with StringView.

third_party/WebKit/Source/core/css/parser/CSSTokenizer.h

Index: third_party/WebKit/Source/core/css/parser/CSSTokenizer.h
diff --git a/third_party/WebKit/Source/core/css/parser/CSSTokenizer.h b/third_party/WebKit/Source/core/css/parser/CSSTokenizer.h
index 41fa90e32fc17a841cf61dacc7d42c326266a52d..c40240d5df689310908a021a35359ba27e795a66 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSTokenizer.h
+++ b/third_party/WebKit/Source/core/css/parser/CSSTokenizer.h
@@ -9,6 +9,7 @@
 #include "core/css/parser/CSSParserToken.h"
 #include "core/html/parser/InputStreamPreprocessor.h"
 #include "wtf/Allocator.h"
+#include "wtf/text/StringView.h"
 #include "wtf/text/WTFString.h"
 
 #include <climits>
@@ -17,7 +18,6 @@ namespace blink {
 
 class CSSTokenizerInputStream;
 class CSSParserObserverWrapper;
-struct CSSParserString;
 class CSSParserTokenRange;
 
 class CORE_EXPORT CSSTokenizer {
@@ -65,7 +65,7 @@ private:
     void consumeUntilCommentEndFound();
 
     bool consumeIfNext(UChar);
-    CSSParserString consumeName();
+    StringView consumeName();
     UChar32 consumeEscape();
 
     bool nextTwoCharsAreValidEscape();
@@ -74,7 +74,7 @@ private:
     bool nextCharsAreIdentifier(UChar);
     bool nextCharsAreIdentifier();
     CSSParserToken blockStart(CSSParserTokenType);
-    CSSParserToken blockStart(CSSParserTokenType blockType, CSSParserTokenType, CSSParserString);
+    CSSParserToken blockStart(CSSParserTokenType blockType, CSSParserTokenType, StringView);
     CSSParserToken blockEnd(CSSParserTokenType, CSSParserTokenType startType);
 
     using CodePoint = CSSParserToken (CSSTokenizer::*)(UChar);
@@ -110,7 +110,7 @@ private:
     CSSParserToken stringStart(UChar);
     CSSParserToken endOfFile(UChar);
 
-    CSSParserString registerString(const String&);
+    StringView registerString(const String&);
 
     CSSTokenizerInputStream& m_input;
     Scope& m_scope;