[WIP] do something :-)

Source/platform/fonts/FontDescription.cpp

 /*
  * Copyright (C) 2007 Nicholas Shanks <contact@nickshanks.com>
  * Copyright (C) 2008 Apple 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.
@@ skipping 13 matching lines @@
  * 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.
  */
 
 #include "config.h"
 #include "platform/fonts/FontDescription.h"
 
 #include "platform/RuntimeEnabledFeatures.h"
+#include "wtf/SizeAssertions.h"
 #include "wtf/text/AtomicStringHash.h"
 #include "wtf/text/StringHash.h"
 
 namespace blink {
 
-struct SameSizeAsFontDescription {
-    FontFamily familyList;
-    RefPtr<FontFeatureSettings> m_featureSettings;
-    AtomicString locale;
-    float sizes[6];
-    // FXIME: Make them fit into one word.
-    uint32_t bitfields;
-    uint32_t bitfields2 : 7;
-};
-
-static_assert(sizeof(FontDescription) == sizeof(SameSizeAsFontDescription), "FontDescription should stay small");
+ASSERT_SIZE(FontDescription, 48, 64);
 
 TypesettingFeatures FontDescription::s_defaultTypesettingFeatures = 0;
 
 bool FontDescription::s_useSubpixelTextPositioning = false;
 
 FontWeight FontDescription::lighterWeight(FontWeight weight)
 {
     switch (weight) {
         case FontWeight100:
         case FontWeight200:
@@ skipping 174 matching lines @@
 
         if (discretionaryLigaturesState() == FontDescription::EnabledLigaturesState
             || historicalLigaturesState() == FontDescription::EnabledLigaturesState
             || contextualLigaturesState() == FontDescription::EnabledLigaturesState) {
             m_typesettingFeatures |= blink::Ligatures;
         }
     }
 }
 
 } // namespace blink