Hi,
in CEF branch 3071 (chromium 59) there is an issue with OSR background color:
in case open view devtools (you may need to hover some elements) and then closing it
the view background color is chanting from transparent to white.
after digging in to it, i found a solution for that (when devtools detaching from view ,
it's clearing the background color to default which is White) :
at src\content\renderer\render_view_impl.cc
void RenderViewImpl::AttachWebFrameWidget(blink::WebFrameWidget* frame_widget) {
// The previous WebFrameWidget must already be detached by CloseForFrame().
DCHECK(!frame_widget_);
frame_widget_ = frame_widget;
// FIX OSR background color //
if (frame_widget_)
frame_widget_->SetBaseBackgroundColor(webkit_preferences_.base_background_color); /// < 0000000000000
// END FIX
}