Backed out changeset 65ff5356cdfa (bug 1373271) for leaking a window in browser_1234021.js a=backout

MozReview-Commit-ID: LZT4Q7ixilz

browser/base/content/tabbrowser.xml

@@ -5643,16 +5643,6 @@
             return;
 
           let browser = event.originalTarget;
-
-          // Preloaded browsers do not actually have any tabs. If one crashes,
-          // it should be released and removed.
-          if (browser === this._preloadedBrowser) {
-            // Calling _getPreloadedBrowser is necessary to actually consume the preloaded browser
-            let preloaded = this._getPreloadedBrowser();
-            preloaded.remove();
-            return;
-          }
-
           let icon = browser.mIconURL;
           let tab = this.getTabForBrowser(browser);
 

browser/components/sessionstore/test/browser_background_tab_crash.js

@@ -219,26 +219,3 @@ add_task(async function test_background_crash_multiple() {
     });
   });
 });
-
-// Tests that crashed preloaded tabs are removed and no unexpected errors are
-// thrown.
-add_task(async function test_preload_crash() {
-  if (!Services.prefs.getBoolPref("browser.newtab.preload")) {
-    return;
-  }
-
-  // Since new tab is only crashable for the activity-stream version,
-  // we need to flip the pref
-  await SpecialPowers.pushPrefEnv({
-    set: [[ "browser.newtabpage.activity-stream.enabled", true ]]
-  });
-
-  // Release any existing preloaded browser
-  gBrowser._getPreloadedBrowser();
-  // Create a fresh preloaded browser
-  gBrowser._createPreloadBrowser();
-
-  await BrowserTestUtils.crashBrowser(gBrowser._preloadedBrowser, false);
-
-  Assert.ok(!gBrowser._preloadedBrowser);
-});