Bug 1734476 - Don't run on compositor when content may contain non-scaling-stroke r=emilio

Differential Revision: https://phabricator.services.mozilla.com/D227400

layout/generic/nsBlockFrame.cpp

@@ -22,6 +22,7 @@
 #include "mozilla/ScrollContainerFrame.h"
 #include "mozilla/StaticPrefs_browser.h"
 #include "mozilla/StaticPrefs_layout.h"
+#include "mozilla/SVGUtils.h"
 #include "mozilla/ToString.h"
 #include "mozilla/UniquePtr.h"
 
@@ -6681,6 +6682,14 @@ static bool EstablishesBFC(const nsBlockFrame* aFrame) {
 
 void nsBlockFrame::DidSetComputedStyle(ComputedStyle* aOldStyle) {
   nsContainerFrame::DidSetComputedStyle(aOldStyle);
+  if (IsInSVGTextSubtree() &&
+      (StyleSVGReset()->HasNonScalingStroke() &&
+       (!aOldStyle || !aOldStyle->StyleSVGReset()->HasNonScalingStroke()))) {
+    nsIFrame* textFrame =
+        nsLayoutUtils::GetClosestFrameOfType(this, LayoutFrameType::SVGText);
+    MOZ_ASSERT(textFrame, "Expecting to find an SVG text frame");
+    SVGUtils::UpdateNonScalingStrokeStateBit(textFrame);
+  }
   if (!aOldStyle) {
     return;
   }