addPageOverlay    562 Source/web/WebDevToolsAgentImpl.cpp     m_webViewImpl->addPageOverlay(this, OverlayZOrders::highlight);
addPageOverlay    281 Source/web/WebViewImpl.h     virtual void addPageOverlay(WebPageOverlay*, int /* zOrder */) OVERRIDE;
addPageOverlay    482 public/web/WebView.h     virtual void addPageOverlay(WebPageOverlay*, int /*z-order*/) = 0;