Chromium already includes the necessary plumbing to manage the
visibility properties and `visibilitychange` event so this gets rid of
most of our custom logic for `BrowserWindow` and `BrowserView`.
Note that `webview` remains unchanged and is still affected by the issues
listed below.
User facing changes:
- The `document` visibility properties and `visibilitychange` event are
now also updated/fired in response to occlusion changes on macOS. In
other words, `document.visibilityState` will now be `hidden` on macOS
if the window is occluded by another window.
- Previously, `visibilitychange` was also fired by *both* Electron and
Chromium in some cases (e.g. when hiding the window). Now it is only
fired by Chromium so you no longer get duplicate events.
- The visiblity state of `BrowserWindow`s created with `{ show: false }`
is now initially `visible` until the window is shown and hidden.
- The visibility state of `BrowserWindow`s with `backgroundThrottling`
disabled is now permanently `visible`.
This should also fix#6860 (but not for `webview`).
This adds the `disableguestresize` property for webviews to prevent the
webview guest from reacting to size changes of the webview element. This
also partially documents the `webContents.setSize` function in order to
manually control the webview guest size.
These two features can be combined to improve resize performance for
e.g. webviews that span the entire window. This greatly reduces the lag
described in #6905.
Fixes#5074 and follows @zcbenz's recommendation to expose ResourceTypeToString from atom_network_delegate publicly.
Also adds testing for other arguments to the `did-get-response-details` events, since there were no existing tests for them.
