Make classes and structures in core/xml, core/input, core/imagebitmap and core/Init fast-allocated.

Source/core/xml/XPathParser.h

 /*
  * Copyright 2005 Maksim Orlovich <maksim@kde.org>
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 11 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef XPathParser_h
 #define XPathParser_h
 
 #include "core/xml/XPathPredicate.h"
 #include "core/xml/XPathStep.h"
+#include "wtf/Allocator.h"
 
 namespace blink {
 
 class ExceptionState;
 class XPathNSResolver;
 
 namespace XPath {
 
 class Expression;
 class LocationPath;
 class ParseNode;
 class Parser;
 class Predicate;
 
 struct Token {
+    STACK_ALLOCATED();
     int type;
     String str;
     Step::Axis axis;
     NumericOp::Opcode numop;
     EqTestOp::Opcode eqop;
 
     Token(int t) : type(t) { }
     Token(int t, const String& v): type(t), str(v) { }
     Token(int t, Step::Axis v): type(t), axis(v) { }
     Token(int t, NumericOp::Opcode v): type(t), numop(v) { }
@@ skipping 51 matching lines @@
 
     HashSet<OwnPtr<String>> m_strings;
 };
 
 } // namespace XPath
 
 } // namespace blink
 
 int xpathyyparse(blink::XPath::Parser*);
 #endif