servo: Merge #13132 - layout: Keep track of whether we've deferred the painting of the document due to a script query (from emilio:deferred-paint); r=pcwalton

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---
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #13131

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- [x] There are tests for these changes OR

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r? @pcwalton

Source-Repo: https://github.com/servo/servo
Source-Revision: acb47007ba9494c73272494efe9ebd2c05e4c014

servo/components/script/layout_wrapper.rs

@@ -405,6 +405,14 @@ impl<'ld> TDocument for ServoLayoutDocument<'ld> {
         let elements =  unsafe { self.document.drain_modified_elements() };
         elements.into_iter().map(|(el, snapshot)| (ServoLayoutElement::from_layout_js(el), snapshot)).collect()
     }
+
+    fn needs_paint_from_layout(&self) {
+        unsafe { self.document.needs_paint_from_layout(); }
+    }
+
+    fn will_paint(&self) {
+        unsafe { self.document.will_paint(); }
+    }
 }
 
 impl<'ld> ServoLayoutDocument<'ld> {