replace COMPILE_ASSERT with static assert in core/css/

Source/core/css/CSSValue.cpp

 /*
  * Copyright (C) 2011 Andreas Kling (kling@webkit.org)
  *
  * 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 46 matching lines @@
 #include "core/css/CSSUnsetValue.h"
 #include "core/css/CSSValueList.h"
 
 namespace blink {
 
 struct SameSizeAsCSSValue : public RefCountedWillBeGarbageCollectedFinalized<SameSizeAsCSSValue>
 {
     uint32_t bitfields;
 };
 
-COMPILE_ASSERT(sizeof(CSSValue) <= sizeof(SameSizeAsCSSValue), CSS_value_should_stay_small);
+static_assert(sizeof(CSSValue) <= sizeof(SameSizeAsCSSValue), "CSSValue should stay small");
 
 bool CSSValue::isImplicitInitialValue() const
 {
     return m_classType == InitialClass && toCSSInitialValue(this)->isImplicit();
 }
 
 bool CSSValue::hasFailedOrCanceledSubresources() const
 {
     if (isValueList())
         return toCSSValueList(this)->hasFailedOrCanceledSubresources();
@@ skipping 456 matching lines @@
         toCSSSVGDocumentValue(this)->traceAfterDispatch(visitor);
         return;
     case CSSContentDistributionClass:
         toCSSContentDistributionValue(this)->traceAfterDispatch(visitor);
         return;
     }
     ASSERT_NOT_REACHED();
 }
 
 }