Remove REPAINT damage in Fragment::build_display_list

Previously, the code that called this function was responsible for this.
Some code paths neglected to do it.  This moves the damage removal to one
central location.

components/layout/block.rs

@@ -50,7 +50,7 @@ use layout_thread::DISPLAY_PORT_SIZE_FACTOR;
 use model::{CollapsibleMargins, MaybeAuto, specified, specified_or_none};
 use model::{self, IntrinsicISizes, MarginCollapseInfo};
 use rustc_serialize::{Encodable, Encoder};
-use script_layout_interface::restyle_damage::{BUBBLE_ISIZES, REFLOW, REFLOW_OUT_OF_FLOW, REPAINT};
+use script_layout_interface::restyle_damage::{BUBBLE_ISIZES, REFLOW, REFLOW_OUT_OF_FLOW};
 use std::cmp::{max, min};
 use std::fmt;
 use std::sync::Arc;
@@ -2134,7 +2134,6 @@ impl Flow for BlockFlow {
 
     fn build_display_list(&mut self, state: &mut DisplayListBuildState) {
         self.build_display_list_for_block(state, BorderPaintingMode::Separate);
-        self.fragment.restyle_damage.remove(REPAINT);
     }
 
     fn repair_style(&mut self, new_style: &Arc<ServoComputedValues>) {

components/layout/display_list_builder.rs

@@ -38,6 +38,7 @@ use model::{self, MaybeAuto, ToGfxMatrix};
 use net_traits::image::base::PixelFormat;
 use net_traits::image_cache_thread::UsePlaceholder;
 use range::Range;
+use script_layout_interface::restyle_damage::REPAINT;
 use std::default::Default;
 use std::sync::Arc;
 use std::{cmp, f32};
@@ -1011,6 +1012,7 @@ impl FragmentDisplayListBuilding for Fragment {
                           display_list_section: DisplayListSection,
                           clip: &ClippingRegion,
                           stacking_relative_display_port: &Rect<Au>) {
+        self.restyle_damage.remove(REPAINT);
         if self.style().get_inheritedbox().visibility != visibility::T::visible {
             return
         }

components/layout/inline.rs

@@ -24,8 +24,8 @@ use gfx_traits::StackingContextId;
 use layout_debug;
 use model::IntrinsicISizesContribution;
 use range::{Range, RangeIndex};
-use script_layout_interface::restyle_damage::{BUBBLE_ISIZES, REFLOW, REFLOW_OUT_OF_FLOW};
-use script_layout_interface::restyle_damage::{REPAINT, RESOLVE_GENERATED_CONTENT};
+use script_layout_interface::restyle_damage::{BUBBLE_ISIZES, REFLOW};
+use script_layout_interface::restyle_damage::{REFLOW_OUT_OF_FLOW, RESOLVE_GENERATED_CONTENT};
 use script_layout_interface::wrapper_traits::PseudoElementType;
 use std::cmp::max;
 use std::collections::VecDeque;
@@ -1642,10 +1642,6 @@ impl Flow for InlineFlow {
 
     fn build_display_list(&mut self, state: &mut DisplayListBuildState) {
         self.build_display_list_for_inline(state);
-
-        for fragment in &mut self.fragments.fragments {
-            fragment.restyle_damage.remove(REPAINT);
-        }
     }
 
     fn repair_style(&mut self, _: &Arc<ServoComputedValues>) {}