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

Source/core/inspector/TimelineTraceEventProcessor.cpp

Index: Source/core/inspector/TimelineTraceEventProcessor.cpp
diff --git a/Source/core/inspector/TimelineTraceEventProcessor.cpp b/Source/core/inspector/TimelineTraceEventProcessor.cpp
index ba28720c02408e6a1d8ce69ab83719860e2e0be3..9145e07d75892f36296242457151851fd04ccbc8 100644
--- a/Source/core/inspector/TimelineTraceEventProcessor.cpp
+++ b/Source/core/inspector/TimelineTraceEventProcessor.cpp
@@ -66,7 +66,7 @@ public:
         MutexLocker locker(m_mutex);
 
         size_t index = m_processors.find(processor);
-        if (index == notFound) {
+        if (index == kNotFound) {
             ASSERT_NOT_REACHED();
             return;
         }
@@ -196,14 +196,14 @@ size_t TimelineTraceEventProcessor::TraceEvent::findParameter(const char* name)
         if (!strcmp(name, m_argumentNames[i]))
             return i;
     }
-    return notFound;
+    return kNotFound;
 }
 
 const TimelineTraceEventProcessor::TraceValueUnion& TimelineTraceEventProcessor::TraceEvent::parameter(const char* name, TraceValueTypes expectedType) const
 {
     static TraceValueUnion missingValue;
     size_t index = findParameter(name);
-    if (index == notFound || m_argumentTypes[index] != expectedType) {
+    if (index == kNotFound || m_argumentTypes[index] != expectedType) {
         ASSERT_NOT_REACHED();
         return missingValue;
     }