Added ASSERT_SIZE checks to CSSValueList and CSSPrimitiveValue

third_party/WebKit/Source/core/css/CSSPrimitiveValue.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2012 Apple Inc. All rights reserved.
  *
  * 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
  * along 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 "core/css/CSSPrimitiveValue.h"
 
 #include "core/css/CSSCalculationValue.h"
 #include "core/css/CSSHelper.h"
 #include "core/css/CSSMarkup.h"
 #include "core/css/CSSToLengthConversionData.h"
 #include "core/css/CSSValuePool.h"
 #include "platform/LayoutUnit.h"
+#include "wtf/SizeAssertions.h"
 #include "wtf/StdLibExtras.h"
 
 using namespace WTF;
 
 namespace blink {
 
 namespace {
 
 // Max/min values for CSS, needs to slightly smaller/larger than the true max/min values to allow for rounding without overflowing.
 // Subtract two (rather than one) to allow for values to be converted to float and back without exceeding the LayoutUnit::max.
 const int maxValueForCssLength = INT_MAX / kFixedPointDenominator - 2;
 const int minValueForCssLength = INT_MIN / kFixedPointDenominator + 2;
 
 } // namespace
 
+struct SameSizeAsCSSPrimitiveValue : CSSValue {
+    double num;
+};
+ASSERT_SIZE(CSSPrimitiveValue, SameSizeAsCSSPrimitiveValue);
+
 float CSSPrimitiveValue::clampToCSSLengthRange(double value)
 {
     return clampTo<float>(value, minValueForCssLength, maxValueForCssLength);
 }
 
 CSSPrimitiveValue::UnitCategory CSSPrimitiveValue::unitTypeToUnitCategory(UnitType type)
 {
     switch (type) {
     case UnitType::Number:
         return CSSPrimitiveValue::UNumber;
@@ skipping 707 matching lines @@
     case UnitType::Calc:
         visitor->trace(m_value.calc);
         break;
     default:
         break;
     }
     CSSValue::traceAfterDispatch(visitor);
 }
 
 } // namespace blink