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

Source/core/html/forms/DateTimeFieldsState.h

 /*
  * Copyright (C) 2012 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
  * 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 DateTimeFieldsState_h
 #define DateTimeFieldsState_h
 
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
 
+#include "wtf/Allocator.h"
+
 namespace blink {
 
 class FormControlState;
 
 // DateTimeFieldsState represents fields in date/time for form state
 // save/restore for input type "date", "datetime", "datetime-local", "month",
 // "time", and "week" with multiple fields input UI.
 //
 // Each field can contain invalid value for date, e.g. day of month field can
 // be 30 even if month field is February.
 class DateTimeFieldsState {
+    STACK_ALLOCATED();
 public:
     enum AMPMValue {
         AMPMValueEmpty = -1,
         AMPMValueAM,
         AMPMValuePM,
     };
 
     static const unsigned emptyValue;
 
     DateTimeFieldsState();
@@ skipping 41 matching lines @@
     unsigned m_second;
     unsigned m_millisecond;
     unsigned m_weekOfYear;
     AMPMValue m_ampm;
 };
 
 } // namespace blink
 
 #endif
 #endif