WTF::notFound looks too much like a local variable.

Source/core/css/StyleInvalidationAnalysis.cpp

Index: Source/core/css/StyleInvalidationAnalysis.cpp
diff --git a/Source/core/css/StyleInvalidationAnalysis.cpp b/Source/core/css/StyleInvalidationAnalysis.cpp
index ab0389da594581924da7a92769a2d28863f62b13..62654df6675755b8578a9156990a1ed7d95a3bda 100644
--- a/Source/core/css/StyleInvalidationAnalysis.cpp
+++ b/Source/core/css/StyleInvalidationAnalysis.cpp
@@ -80,7 +80,7 @@ static bool hasDistributedRule(StyleSheetContents* styleSheetContents)
 
         const StyleRule* styleRule = toStyleRule(rule);
         const CSSSelectorList& selectorList = styleRule->selectorList();
-        for (size_t selectorIndex = 0; selectorIndex != notFound; selectorIndex = selectorList.indexOfNextSelectorAfter(selectorIndex)) {
+        for (size_t selectorIndex = 0; selectorIndex != kNotFound; selectorIndex = selectorList.indexOfNextSelectorAfter(selectorIndex)) {
             if (selectorList.hasShadowDistributedAt(selectorIndex))
                 return true;
         }