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

Source/core/html/forms/TypeAhead.h

Index: Source/core/html/forms/TypeAhead.h
diff --git a/Source/core/html/forms/TypeAhead.h b/Source/core/html/forms/TypeAhead.h
index e6c5601f29e2e563a7c8c94d472693631e56a785..77ec9971a4190f7d956acadb630fb8dcec1f52ff 100644
--- a/Source/core/html/forms/TypeAhead.h
+++ b/Source/core/html/forms/TypeAhead.h
@@ -28,6 +28,7 @@
 
 #include "core/CoreExport.h"
 #include "core/dom/DOMTimeStamp.h"
+#include "wtf/Allocator.h"
 #include "wtf/text/StringBuilder.h"
 #include "wtf/text/WTFString.h"
 
@@ -45,6 +46,7 @@ public:
 };
 
 class TypeAhead {
+    DISALLOW_ALLOCATION();
 public:
     TypeAhead(TypeAheadDataSource*);