Bug 1678965 - Part 2: set cross opener group for openLinkIn tabs opened as new tabs, r=dao

Depends on D100152

Differential Revision: https://phabricator.services.mozilla.com/D136176

browser/actors/ClickHandlerParent.jsm

@@ -112,6 +112,7 @@ class ClickHandlerParent extends JSWindowActorParent {
       triggeringPrincipal: data.triggeringPrincipal,
       csp: data.csp ? E10SUtils.deserializeCSP(data.csp) : null,
       frameID: data.frameID,
+      openerBrowser: browser,
     };
 
     // The new tab/window must use the same userContextId.

browser/base/content/tabbrowser.js

@@ -2820,6 +2820,20 @@
           });
         } else {
           this._insertBrowser(t, true);
+          // If we were called by frontend and don't have openWindowInfo,
+          // but we were opened from another browser, set the cross group
+          // opener ID:
+          if (openerBrowser && !openWindowInfo) {
+            try {
+              b.browsingContext.setCrossGroupOpener(
+                openerBrowser.browsingContext
+              );
+            } catch (ex) {
+              // Shouldn't happen, but we shouldn't break tabbrowser if
+              // this failed.
+              Cu.reportError(ex);
+            }
+          }
         }
       } catch (e) {
         Cu.reportError("Failed to create tab");

uriloader/exthandler/tests/mochitest/browser_auto_close_window.js

@@ -90,6 +90,32 @@ add_task(async function simple_navigation() {
   });
 });
 
+add_task(async function accel_navigation() {
+  await BrowserTestUtils.withNewTab({ gBrowser, url: PAGE_URL }, async function(
+    browser
+  ) {
+    let dialogAppeared = promiseHelperAppDialog();
+    let tabOpened = BrowserTestUtils.waitForEvent(
+      gBrowser.tabContainer,
+      "TabOpen"
+    ).then(event => {
+      return [event.target, BrowserTestUtils.waitForTabClosing(event.target)];
+    });
+
+    await BrowserTestUtils.synthesizeMouseAtCenter(
+      "#regular_load",
+      { accelKey: true },
+      browser
+    );
+
+    let windowContext = await dialogAppeared;
+    is(windowContext, browser.ownerGlobal, "got the right windowContext");
+    let [tab, closingPromise] = await tabOpened;
+    await closingPromise;
+    is(tab.linkedBrowser, null, "tab was opened and closed");
+  });
+});
+
 // Given a browser pointing to download_page.html, clicks on the link that
 // opens with target="_blank" (i.e. a new tab) and ensures that we
 // automatically open and close that tab.