NOT FOR LANDING: Hack up CSSParser for speed.

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..53eda66437026a5f525d0c76523b79d367c71a6a 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSTokenizer.h
+++ b/third_party/WebKit/Source/core/css/parser/CSSTokenizer.h
@@ -35,7 +35,7 @@ public:
 
     private:
         void storeString(const String& string) { m_stringPool.append(string); }
-        Vector<CSSParserToken> m_tokens;
+        Vector<CSSParserToken, 32> m_tokens;

[esprehn, 2016/04/22 23:30:58]

Lots of malloc in the profiles. By using inline capacity here I saved a bunch of
time.

         // We only allocate strings when escapes are used.
         Vector<String> m_stringPool;
         String m_string;
@@ -80,7 +80,7 @@ private:
     using CodePoint = CSSParserToken (CSSTokenizer::*)(UChar);
 
     static const CodePoint codePoints[];
-    Vector<CSSParserTokenType> m_blockStack;
+    Vector<CSSParserTokenType, 8> m_blockStack;

[esprehn, 2016/04/22 23:30:58]

ditto

 
     CSSParserToken whiteSpace(UChar);
     CSSParserToken leftParenthesis(UChar);