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

Source/core/html/NumberInputType.cpp

Index: Source/core/html/NumberInputType.cpp
diff --git a/Source/core/html/NumberInputType.cpp b/Source/core/html/NumberInputType.cpp
index 8778db7eeca98845d28c1c31cd5f9c7104682b23..7bffcad68088bc01d2f6aea2a1ab82dbdcc5a282 100644
--- a/Source/core/html/NumberInputType.cpp
+++ b/Source/core/html/NumberInputType.cpp
@@ -235,7 +235,7 @@ String NumberInputType::localizeValue(const String& proposedValue) const
     if (proposedValue.isEmpty())
         return proposedValue;
     // We don't localize scientific notations.
-    if (proposedValue.find(isE) != notFound)
+    if (proposedValue.find(isE) != kNotFound)
         return proposedValue;
     return element()->locale().convertToLocalizedNumber(proposedValue);
 }
@@ -250,7 +250,7 @@ String NumberInputType::convertFromVisibleValue(const String& visibleValue) cons
     if (visibleValue.isEmpty())
         return visibleValue;
     // We don't localize scientific notations.
-    if (visibleValue.find(isE) != notFound)
+    if (visibleValue.find(isE) != kNotFound)
         return visibleValue;
     return element()->locale().convertFromLocalizedNumber(visibleValue);
 }