Use bit-fields for space saving in PointerEventsHitRules

Source/core/rendering/PointerEventsHitRules.cpp

Index: Source/core/rendering/PointerEventsHitRules.cpp
diff --git a/Source/core/rendering/PointerEventsHitRules.cpp b/Source/core/rendering/PointerEventsHitRules.cpp
index 1691f0dfb8c1da42fa38cbaf0495132a702a82e4..39320b03cf7673182d9bbd212702517d2205220d 100644
--- a/Source/core/rendering/PointerEventsHitRules.cpp
+++ b/Source/core/rendering/PointerEventsHitRules.cpp
@@ -20,8 +20,16 @@
 #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)