Bug 1622926 - Don't restore scrolldata and form data when switching processes. r=droeh

That data is not the right one anyway, since it comes from the previous page
rather than the current one.

Note: this is also broken on desktop too. It will be fixed once we move to main
process history (hopefully?).

Differential Revision: https://phabricator.services.mozilla.com/D67392

--HG--
extra : moz-landing-system : lando

mobile/android/chrome/geckoview/geckoview.js

@@ -165,10 +165,12 @@ var ModuleManager = {
     // to collect it and restore it in the other process when switching.
     // TODO: This should go away when we migrate the history to the main
     // process Bug 1507287.
-    const sessionState = await this.getActor("GeckoViewContent").sendQuery(
+    const { history } = await this.getActor("GeckoViewContent").sendQuery(
       "CollectSessionState"
     );
-    const { history } = sessionState;
+    // Ignore scroll and form data since we're navigating away from this page
+    // anyway
+    const sessionState = { history };
 
     // If the navigation is from history we don't need to load the page again
     // so we ignore loadOptions