6 files changed, 14 insertions, 13 deletions
diff --git a/dom/base/Element.cpp b/dom/base/Element.cpp
index 5bbfbee9b..ba5ba9c72 100644
--- a/dom/base/Element.cpp
+++ b/dom/base/Element.cpp
@@ -1119,7 +1119,7 @@ Element::CreateShadowRoot(ErrorResult& aError)
 
   if (nsIDocument* doc = GetComposedDoc()) {
     if (nsIPresShell* shell = doc->GetShell()) {
-      shell->DestroyFramesFor(this);
+      shell->DestroyFramesForAndRestyle(this);
       MOZ_ASSERT(!shell->FrameManager()->GetDisplayContentsStyleFor(this));
     }
   }
diff --git a/dom/base/ShadowRoot.cpp b/dom/base/ShadowRoot.cpp
index f19cad6df..5f61b1f4d 100644
--- a/dom/base/ShadowRoot.cpp
+++ b/dom/base/ShadowRoot.cpp
@@ -265,8 +265,7 @@ ShadowRoot::DistributionChanged()
     return;
   }
 
-  // FIXME(emilio): Rename this to DestroyFramesForAndRestyle?
-  shell->DestroyFramesFor(host);
+  shell->DestroyFramesForAndRestyle(host);
 }
 
 const HTMLContentElement*
@@ -513,7 +512,7 @@ ShadowRoot::AttributeChanged(nsIDocument* aDocument,
     return;
   }
 
-  shell->DestroyFramesFor(aElement);
+  shell->DestroyFramesForAndRestyle(aElement);
 }
 
 bool
diff --git a/dom/xbl/nsXBLService.cpp b/dom/xbl/nsXBLService.cpp
index ef0d20564..b50b2c6fe 100644
--- a/dom/xbl/nsXBLService.cpp
+++ b/dom/xbl/nsXBLService.cpp
@@ -125,7 +125,7 @@ public:
     // since if the binding fetch fails then we don't want to destroy the
     // frames.
     if (nsIPresShell* shell = doc->GetShell()) {
-      shell->DestroyFramesFor(mBoundElement->AsElement());
+      shell->DestroyFramesForAndRestyle(mBoundElement->AsElement());
     }
     MOZ_ASSERT(!mBoundElement->GetPrimaryFrame());
   }
diff --git a/layout/base/nsIPresShell.h b/layout/base/nsIPresShell.h
index 2df75489f..5f83b9c15 100644
--- a/layout/base/nsIPresShell.h
+++ b/layout/base/nsIPresShell.h
@@ -544,7 +544,7 @@ public:
    *
    * Note that this may destroy frames for an ancestor instead.
    */
-  virtual void DestroyFramesFor(mozilla::dom::Element* aElement) = 0;
+  virtual void DestroyFramesForAndRestyle(mozilla::dom::Element* aElement) = 0;
 
   /**
    * Recreates the frames for a node
diff --git a/layout/base/nsPresShell.cpp b/layout/base/nsPresShell.cpp
index f861e7b06..bd5125637 100644
--- a/layout/base/nsPresShell.cpp
+++ b/layout/base/nsPresShell.cpp
@@ -2828,7 +2828,7 @@ PresShell::CancelAllPendingReflows()
 }
 
 void
-PresShell::DestroyFramesFor(Element* aElement)
+PresShell::DestroyFramesForAndRestyle(Element* aElement)
 {
   MOZ_ASSERT(aElement);
   NS_ENSURE_TRUE_VOID(mPresContext);
@@ -2847,13 +2847,15 @@ PresShell::DestroyFramesFor(Element* aElement)
   fc->DestroyFramesFor(aElement, &didReconstruct);
   fc->EndUpdate();
 
-  // XXXmats doesn't frame state need to be restored in this case?
-  if (!didReconstruct) {
-    PostRecreateFramesFor(aElement);
-  }
+  auto changeHint = didReconstruct
+    ? nsChangeHint(0)
+    : nsChangeHint_ReconstructFrame;
 
+  // NOTE(emilio): eRestyle_Subtree is needed to force also a full subtree
+  // restyle for the content (in Stylo, where the existence of frames != the
+  // existence of styles).
   mPresContext->RestyleManager()->PostRestyleEvent(
-    aElement, eRestyle_Subtree, nsChangeHint(0));
+    aElement, eRestyle_Subtree, changeHint);
 
   --mChangeNestCount;
 }
diff --git a/layout/base/nsPresShell.h b/layout/base/nsPresShell.h
index a0d2ea753..628e613c8 100644
--- a/layout/base/nsPresShell.h
+++ b/layout/base/nsPresShell.h
@@ -139,7 +139,7 @@ public:
   virtual bool IsSafeToFlush() const override;
   virtual void FlushPendingNotifications(mozFlushType aType) override;
   virtual void FlushPendingNotifications(mozilla::ChangesToFlush aType) override;
-  virtual void DestroyFramesFor(mozilla::dom::Element* aElement) override;
+  virtual void DestroyFramesForAndRestyle(mozilla::dom::Element* aElement) override;
 
   /**
    * Recreates the frames for a node