зеркало из https://github.com/mozilla/gecko-dev.git
Bug 1634988 - guard state against being undefined in BrowserElementParent. r=mconley
Differential Revision: https://phabricator.services.mozilla.com/D84896
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@ -311,6 +311,11 @@ var PermitUnloader = {
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_transitionFrameState(windowGlobal, newFrameState) {
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let frameLoader = windowGlobal.rootFrameLoader;
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let state = this.inProgressPermitUnload.get(frameLoader);
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if (!state) {
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return;
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}
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let oldFrameState = state.frameStates.get(windowGlobal);
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if (oldFrameState == STATE_WAITING) {
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