accessibility/textarea-insertion-point-line-number.html is failing on all GTK platforms. http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20-%20webkit.org&tests=accessibility%2Ftextarea-insertion-point-line-number.html
Another failure due to the need to implement a method in our DRT: AccessibilityUIElement::insertionPointLineNumber() Piñeiro, this one is yours.