Use bit-fields for space saving in PointerEventsHitRules

Source/core/rendering/PointerEventsHitRules.cpp

 /*
     Copyright (C) 2007 Rob Buis <buis@kde.org>
 
     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
     aint 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.
 */
 
 #include "config.h"
 #include "core/rendering/PointerEventsHitRules.h"
 
+#include <base/macros.h>

[rwlbuis, 2014/10/03 18:25:45]

not lgtm

I forgot about this. This does not seem to be the right
include. Is it even needed?

[Sunil Ratnu, 2014/10/04 09:06:17]

Oops. My mistake. Corrected the include now.

+
 namespace blink {
 
+struct SameSizeAsPointerEventsHitRules {
+    unsigned bitfields;
+};
+
+COMPILE_ASSERT(sizeof(PointerEventsHitRules) <= sizeof(SameSizeAsPointerEventsHitRules), PointerEventsHitRules_should_stay_small);
+
 PointerEventsHitRules::PointerEventsHitRules(EHitTesting hitTesting, const HitTestRequest& request, EPointerEvents pointerEvents)
     : requireVisible(false)
     , requireFill(false)
     , requireStroke(false)
     , canHitStroke(false)
     , canHitFill(false)
     , canHitBoundingBox(false)
 {
     if (request.svgClipContent())
         pointerEvents = PE_FILL;
@@ skipping 74 matching lines @@
             case PE_NONE:
                 // nothing to do here, defaults are all false.
                 break;
         }
     }
 }
 
 }
 
 // vim:ts=4:noet