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

Source/core/platform/network/HTTPParsers.cpp

Index: Source/core/platform/network/HTTPParsers.cpp
diff --git a/Source/core/platform/network/HTTPParsers.cpp b/Source/core/platform/network/HTTPParsers.cpp
index 979dd267357229f67bec292e70d05408f129e0e1..cc2b296921d96bd1c1bd905dca36f96f0c0e7737 100644
--- a/Source/core/platform/network/HTTPParsers.cpp
+++ b/Source/core/platform/network/HTTPParsers.cpp
@@ -246,7 +246,7 @@ String filenameFromHTTPContentDisposition(const String& value)
     unsigned length = keyValuePairs.size();
     for (unsigned i = 0; i < length; i++) {
         size_t valueStartPos = keyValuePairs[i].find('=');
-        if (valueStartPos == notFound)
+        if (valueStartPos == kNotFound)
             continue;
 
         String key = keyValuePairs[i].left(valueStartPos).stripWhiteSpace();
@@ -318,7 +318,7 @@ void findCharsetInMediaType(const String& mediaType, unsigned int& charsetPos, u
 
     while (pos < length) {
         pos = mediaType.find("charset", pos, false);
-        if (pos == notFound || pos == 0) {
+        if (pos == kNotFound || !pos) {
             charsetLen = 0;
             return;
         }