Reproduces with Raleigh of 3.4.2 and Adwaita of 3.16.7.

Review commit: https://reviewboard.mozilla.org/r/43693/diff/#index_header See other reviews: https://reviewboard.mozilla.org/r/43693/

gtk_render_handle() in GTK+-3.4.2 at least uses the background color to draw resizers. background-color defaults to transparent and is not inherited. GtkTextView typically has its own background color, and I think we should be using GtkTextView for textfield-multiline. If we start seeing the wrong background color being drawn, then maybe it could be better not to draw resizers in some situations. The cursor appearance changes to indicate resize is available anyway. However, this patch works for Adwaita and Raleigh at least. Tested with Raleigh and Ambiance with 3.4.2 and Raleigh and Adwaita of 3.16.7.

Comment on attachment 8737059 [details] MozReview Request: bug 1261277 use GtkTextView to get an appropriate color for resizers r?acomminos https://reviewboard.mozilla.org/r/43693/#review40265 Looks good! ::: widget/gtk/gtk3drawing.cpp:720 (Diff revision 1) > + if (gTextViewWidget) > + return; > + > + gTextViewWidget = gtk_text_view_new(); > + ensure_scrolled_window_widget(); > + gtk_container_add(GTK_CONTAINER(gScrolledWindowWidget), gTextViewWidget);; Double semicolon at the end of the line here.

Comment on attachment 8737059 [details] MozReview Request: bug 1261277 use GtkTextView to get an appropriate color for resizers r?acomminos Review request updated; see interdiff: https://reviewboard.mozilla.org/r/43693/diff/1-2/