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

Source/web/PageOverlayList.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 35 matching lines @@
 }
 
 PageOverlayList::~PageOverlayList()
 {
 }
 
 bool PageOverlayList::add(WebPageOverlay* overlay, int zOrder)
 {
     bool added = false;
     size_t index = find(overlay);
-    if (index == WTF::notFound) {
+    if (index == WTF::kNotFound) {
         OwnPtr<PageOverlay> pageOverlay = PageOverlay::create(m_viewImpl, overlay);
         m_pageOverlays.append(pageOverlay.release());
         index = m_pageOverlays.size() - 1;
         added = true;
     }
 
     PageOverlay* pageOverlay = m_pageOverlays[index].get();
     pageOverlay->setZOrder(zOrder);
 
     // Adjust page overlay list order based on their z-order numbers. We first
@@ skipping 24 matching lines @@
         update();
     } else
         pageOverlay->update();
 
     return added;
 }
 
 bool PageOverlayList::remove(WebPageOverlay* overlay)
 {
     size_t index = find(overlay);
-    if (index == WTF::notFound)
+    if (index == WTF::kNotFound)
         return false;
 
     m_pageOverlays[index]->clear();
     m_pageOverlays.remove(index);
     return true;
 }
 
 void PageOverlayList::update()
 {
     for (size_t i = 0; i < m_pageOverlays.size(); ++i)
         m_pageOverlays[i]->update();
 }
 
 void PageOverlayList::paintWebFrame(WebCore::GraphicsContext& gc)
 {
     for (size_t i = 0; i < m_pageOverlays.size(); ++i)
         m_pageOverlays[i]->paintWebFrame(gc);
 }
 
 size_t PageOverlayList::find(WebPageOverlay* overlay)
 {
     for (size_t i = 0; i < m_pageOverlays.size(); ++i) {
         if (m_pageOverlays[i]->overlay() == overlay)
             return i;
     }
-    return WTF::notFound;
+    return WTF::kNotFound;
 }
 
 size_t PageOverlayList::findGraphicsLayer(WebCore::GraphicsLayer* layer)
 {
     for (size_t i = 0; i < m_pageOverlays.size(); ++i) {
         if (m_pageOverlays[i]->graphicsLayer() == layer)
             return i;
     }
-    return WTF::notFound;
+    return WTF::kNotFound;
 }
 
 } // namespace WebKit