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

Source/core/html/track/vtt/VTTToken.h

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * 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 VTTToken_h
 #define VTTToken_h
 
+#include "wtf/Allocator.h"
+
 namespace blink {
 
 class VTTTokenTypes {
+    STATIC_ONLY(VTTTokenTypes);
 public:
     enum Type {
         Uninitialized,
         Character,
         StartTag,
         EndTag,
         TimestampTag,
     };
 };
 
 class VTTToken {
+    STACK_ALLOCATED();
 public:
     typedef VTTTokenTypes Type;
 
     VTTToken() : m_type(Type::Uninitialized) { }
 
     static VTTToken StringToken(const String& characterData)
     {
         return VTTToken(Type::Character, characterData);
     }
     static VTTToken StartTag(const String& tagName, const AtomicString& classes = emptyAtom, const AtomicString& annotation = emptyAtom)
@@ skipping 25 matching lines @@
 
     Type::Type m_type;
     String m_data;
     AtomicString m_annotation;
     AtomicString m_classes;
 };
 
 }
 
 #endif