Do not zero-initialize RawPtr.

Source/core/css/CSSCalculationValue.cpp

Index: Source/core/css/CSSCalculationValue.cpp
diff --git a/Source/core/css/CSSCalculationValue.cpp b/Source/core/css/CSSCalculationValue.cpp
index 03eefe953d70671b4986e3b9f11b08caeb4c4b4b..6914542ccb7f928ab74ed181f18f35cbf310ff59 100644
--- a/Source/core/css/CSSCalculationValue.cpp
+++ b/Source/core/css/CSSCalculationValue.cpp
@@ -559,7 +559,7 @@ private:
     struct Value {
         DISALLOW_ALLOCATION(); // Is only ever stack allocated.

[haraken, 2014/03/24 13:52:54]

Can this be STACK_ALLOCATED() ?

[Mads Ager (chromium), 2014/03/24 14:27:30]

If the comments are true both this and CSSCalcExpressionNodeParser can be stack
allocated. Thanks!

     public:
-        RefPtrWillBeRawPtr<CSSCalcExpressionNode> value;
+        RefPtrWillBeRawPtr<CSSCalcExpressionNode> value = nullptr;

[haraken, 2014/03/24 13:52:54]

Then this could be a RefPtrWillBeMember.

[Mads Ager (chromium), 2014/03/24 14:27:30]

Done.

     };
 
     char operatorValue(CSSParserValueList* tokens, unsigned index)
@@ -744,7 +744,7 @@ PassRefPtrWillBeRawPtr<CSSCalcExpressionNode> CSSCalcValue::createExpressionNode
 PassRefPtrWillBeRawPtr<CSSCalcValue> CSSCalcValue::create(CSSParserString name, CSSParserValueList* parserValueList, ValueRange range)
 {
     CSSCalcExpressionNodeParser parser;
-    RefPtrWillBeRawPtr<CSSCalcExpressionNode> expression;
+    RefPtrWillBeRawPtr<CSSCalcExpressionNode> expression = nullptr;
 
     if (equalIgnoringCase(name, "calc(") || equalIgnoringCase(name, "-webkit-calc("))
         expression = parser.parseCalc(parserValueList);