Revert bug 999604 and remove now-redundant cleanup code

toolkit/content/tests/browser/browser_autoscroll_disabled.js

@@ -3,8 +3,6 @@ function test()
   const kPrefName_AutoScroll = "general.autoScroll";
   Services.prefs.setBoolPref(kPrefName_AutoScroll, false);
 
-  gBrowser.selectedTab = gBrowser.addTab();
-
   var doc;
 
   function startLoad(dataUri) {
@@ -27,9 +25,6 @@ function test()
     if (Services.prefs.prefHasUserValue(kPrefName_AutoScroll))
       Services.prefs.clearUserPref(kPrefName_AutoScroll);
 
-    // cleaning-up
-    gBrowser.removeCurrentTab();
-
     // waitForFocus() fixes a failure in the next test if the latter runs too soon.
     waitForFocus(finish);
   }

toolkit/content/tests/browser/browser_bug295977_autoscroll_overflow.js

@@ -3,8 +3,6 @@ function test()
   const kPrefName_AutoScroll = "general.autoScroll";
   Services.prefs.setBoolPref(kPrefName_AutoScroll, true);
 
-  gBrowser.selectedTab = gBrowser.addTab();
-
   const expectScrollNone = 0;
   const expectScrollVert = 1;
   const expectScrollHori = 2;
@@ -126,9 +124,6 @@ function test()
     if (Services.prefs.prefHasUserValue(kPrefName_AutoScroll))
       Services.prefs.clearUserPref(kPrefName_AutoScroll);
 
-    // cleaning-up
-    gBrowser.removeCurrentTab();
-
     // waitForFocus() fixes a failure in the next test if the latter runs too soon.
     waitForFocus(finish);
   }

toolkit/content/tests/browser/browser_default_image_filename.js

@@ -12,14 +12,8 @@ function test() {
   waitForExplicitFinish();
   var fileName;
 
-  gBrowser.selectedTab = gBrowser.addTab();
-
   gBrowser.loadURI("data:image/gif;base64,R0lGODlhEAAOALMAAOazToeHh0tLS/7LZv/0jvb29t/f3//Ub//ge8WSLf/rhf/3kdbW1mxsbP//mf///yH5BAAAAAAALAAAAAAQAA4AAARe8L1Ekyky67QZ1hLnjM5UUde0ECwLJoExKcppV0aCcGCmTIHEIUEqjgaORCMxIC6e0CcguWw6aFjsVMkkIr7g77ZKPJjPZqIyd7sJAgVGoEGv2xsBxqNgYPj/gAwXEQA7");
 
-  registerCleanupFunction(function () {
-    gBrowser.removeCurrentTab();
-  });
-
   gBrowser.addEventListener("pageshow", function pageShown(event) {
     if (event.target.location == "about:blank")
       return;

toolkit/content/tests/browser/browser_keyevents_during_autoscrolling.js

@@ -3,8 +3,6 @@ function test()
   const kPrefName_AutoScroll = "general.autoScroll";
   Services.prefs.setBoolPref(kPrefName_AutoScroll, true);
 
-  gBrowser.selectedTab = gBrowser.addTab();
-
   const kNoKeyEvents   = 0;
   const kKeyDownEvent  = 1;
   const kKeyPressEvent = 2;
@@ -127,9 +125,6 @@ function test()
     if (Services.prefs.prefHasUserValue(kPrefName_AutoScroll))
       Services.prefs.clearUserPref(kPrefName_AutoScroll);
 
-    // cleaning-up
-    gBrowser.removeCurrentTab();
-
     finish();
   }
 }

toolkit/content/tests/browser/browser_save_resend_postdata.js

@@ -17,14 +17,8 @@ MockFilePicker.init(window);
 function test() {
   waitForExplicitFinish();
 
-  gBrowser.selectedTab = gBrowser.addTab();
-
   gBrowser.loadURI("http://mochi.test:8888/browser/toolkit/content/tests/browser/data/post_form_outer.sjs");
 
-  registerCleanupFunction(function () {
-    gBrowser.removeCurrentTab();
-  });
-
   gBrowser.addEventListener("pageshow", function pageShown(event) {
     if (event.target.location == "about:blank")
       return;