SetThumbThickness  125 cc/layers/painted_scrollbar_layer.cc   scrollbar_layer->SetThumbThickness(thumb_thickness_);
SetThumbThickness   56 cc/layers/painted_scrollbar_layer_impl.cc   scrollbar_layer->SetThumbThickness(thumb_thickness_);
SetThumbThickness   36 cc/layers/painted_scrollbar_layer_impl.h   void SetThumbThickness(int thumb_thickness);