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

Source/core/html/canvas/CanvasRenderingContext2D.cpp

Index: Source/core/html/canvas/CanvasRenderingContext2D.cpp
diff --git a/Source/core/html/canvas/CanvasRenderingContext2D.cpp b/Source/core/html/canvas/CanvasRenderingContext2D.cpp
index 6169d86ad0ccb73d1b6678ab279c5b77fd10836f..4d7b8c43d0a40af0aecb4b810b8fecb7bba8f5b4 100644
--- a/Source/core/html/canvas/CanvasRenderingContext2D.cpp
+++ b/Source/core/html/canvas/CanvasRenderingContext2D.cpp
@@ -2160,7 +2160,7 @@ static void replaceCharacterInString(String& text, WTF::CharacterMatchFunctionPt
 {
     const size_t replacementLength = replacement.length();
     size_t index = 0;
-    while ((index = text.find(matchFunction, index)) != notFound) {
+    while ((index = text.find(matchFunction, index)) != kNotFound) {
         text.replace(index, 1, replacement);
         index += replacementLength;
     }