Make classes and structures in core/dom fast-allocated.

Source/core/dom/Attribute.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef Attribute_h
 #define Attribute_h
 
 #include "core/dom/QualifiedName.h"
+#include "wtf/Allocator.h"
 
 namespace blink {
 
 // This is the internal representation of an attribute, consisting of a name and
 // value. It is distinct from the web-exposed Attr, which also knows of the
 // element to which it attached, if any.
 class Attribute {
+    ALLOW_ONLY_INLINE_ALLOCATION();
 public:
     Attribute(const QualifiedName& name, const AtomicString& value)
         : m_name(name)
         , m_value(value)
     {
     }
 
     // NOTE: The references returned by these functions are only valid for as long
     // as the Attribute stays in place. For example, calling a function that mutates
     // an Element's internal attribute storage may invalidate them.
@@ skipping 28 matching lines @@
 inline bool Attribute::matches(const QualifiedName& qualifiedName) const
 {
     if (qualifiedName.localName() != localName())
         return false;
     return qualifiedName.prefix() == starAtom || qualifiedName.namespaceURI() == namespaceURI();
 }
 
 } // namespace blink
 
 #endif // Attribute_h