Make blink classes and structures in core/css fast-allocated

Source/core/css/parser/CSSParserString.h

Index: Source/core/css/parser/CSSParserString.h
diff --git a/Source/core/css/parser/CSSParserString.h b/Source/core/css/parser/CSSParserString.h
index 1619141157f6eeb915da50b55cf9a584fe735b45..f3434ab6c590dd4263beae72eeb018389f09ae9e 100644
--- a/Source/core/css/parser/CSSParserString.h
+++ b/Source/core/css/parser/CSSParserString.h
@@ -21,12 +21,14 @@
 #ifndef CSSParserString_h
 #define CSSParserString_h
 
+#include "wtf/Allocator.h"
 #include "wtf/text/AtomicString.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 struct CSSParserString {
+    STACK_ALLOCATED();
     void init(const LChar* characters, unsigned length)
     {
         m_data.characters8 = characters;