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#439: M1368852

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This commit is contained in:
Cameron Kaiser 2017-09-30 22:38:45 -07:00
parent 9d4ebbc228
commit 607c3038cb
1 changed files with 10 additions and 1 deletions
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11
layout/generic/nsSubDocumentFrame.cpp
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@ -951,7 +951,16 @@ public:
// Flush frames, to ensure any pending display:none changes are made.
// Note it can be unsafe to flush if we've destroyed the presentation
// for some other reason, like if we're shutting down.
if (!mPresShell->IsDestroying()) {
//
// But avoid the flush if we know for sure we're away, like when we're out
// of the document already.
//
// FIXME(emilio): This could still be a perf footgun when removing lots of
// siblings where each of them cause the reframe of an ancestor which happen
// to contain a subdocument.
//
// We should find some way to avoid that!
if (!mPresShell->IsDestroying() && mFrameElement->IsInComposedDoc()) {
mPresShell->FlushPendingNotifications(Flush_Frames);
}