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As part of bug 1510569, the majority of the `nsIWebProgress` event listeners have moved from the `WebProgressChild`/`RemoteWebProgress` to the `BrowserChild`/`BrowserParent`. In responsive design mode, the `RemoteWebProgress` previously would update the state of the `<iframe mozbrowser>` with document URI and title which would be mirrored back to the `<xul:browser>` when leaving RDM. However, the event handlers in the `BrowserParent` call directly into the `<xul:browser>`, skipping the `<iframe mozbrowser>` entirely. Therefore, when RDM is shut down, old state will be mirroed to the `<xul:browser>`, leaving it in an inconsistent state. We now mirror the state from the `<xul:browser>` to the `<iframe mozbrowser>` with an `nsIWebProgressListener` so that the `<iframe mozbrowser>` will not clobber the `<xul:browser>`'s state when leaving RDM. Differential Revision: https://phabricator.services.mozilla.com/D38918 --HG-- extra : moz-landing-system : lando |
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