Fix gradient position if background-clip is present.

components/layout/display_list_builder.rs

@@ -409,6 +409,7 @@ pub trait FragmentDisplayListBuilding {
                                                   state: &mut DisplayListBuildState,
                                                   display_list_section: DisplayListSection,
                                                   absolute_bounds: &Rect<Au>,
+                                                  clip_bounds: &Rect<Au>,
                                                   clip: &ClippingRegion,
                                                   gradient: &Gradient,
                                                   style: &ServoComputedValues);
@@ -803,6 +804,7 @@ impl FragmentDisplayListBuilding for Fragment {
                 Some(computed::Image::Gradient(ref gradient)) => {
                     self.build_display_list_for_background_gradient(state,
                                                                     display_list_section,
+                                                                    &absolute_bounds,
                                                                     &bounds,
                                                                     &clip,
                                                                     gradient,
@@ -1132,18 +1134,19 @@ impl FragmentDisplayListBuilding for Fragment {
                                                   state: &mut DisplayListBuildState,
                                                   display_list_section: DisplayListSection,
                                                   absolute_bounds: &Rect<Au>,
+                                                  clip_bounds: &Rect<Au>,
                                                   clip: &ClippingRegion,
                                                   gradient: &Gradient,
                                                   style: &ServoComputedValues) {
         let mut clip = clip.clone();
-        clip.intersect_rect(absolute_bounds);
+        clip.intersect_rect(clip_bounds);
 
-        let border = style.logical_border_width().to_physical(style.writing_mode);
+        let border_padding = self.border_padding.to_physical(style.writing_mode);
         let mut bounds = *absolute_bounds;
-        bounds.origin.x += border.left;
-        bounds.origin.y += border.top;
-        bounds.size.width -= border.horizontal();
-        bounds.size.height -= border.vertical();
+        bounds.origin.x = bounds.origin.x + border_padding.left;
+        bounds.origin.y = bounds.origin.y + border_padding.top;
+        bounds.size.width = bounds.size.width - border_padding.horizontal();
+        bounds.size.height = bounds.size.height - border_padding.vertical();
 
         let base = state.create_base_display_item(&bounds,
                                                   &clip,