Unignoring a couple more tests in marionette

Author: barancev

java/client/test/org/openqa/selenium/PageLoadingTest.java

@@ -282,7 +282,7 @@ public void testShouldDoNothingIfThereIsNothingToGoBackTo() {
     assertThat(driver.getTitle(), equalTo(originalTitle));
   }
 
-  @Ignore(value = {SAFARI, MARIONETTE}, issues = {3771})
+  @Ignore(value = {SAFARI}, issues = {3771})
   @Test
   public void testShouldBeAbleToNavigateBackInTheBrowserHistory() {
     driver.get(pages.formPage);
@@ -306,7 +306,7 @@ public void testShouldBeAbleToNavigateBackInTheBrowserHistoryInPresenceOfIframes
     wait.until(titleIs("XHTML Test Page"));
   }
 
-  @Ignore(value = {SAFARI, MARIONETTE}, issues = {3771})
+  @Ignore(value = {SAFARI}, issues = {3771})
   @Test
   public void testShouldBeAbleToNavigateForwardsInTheBrowserHistory() {
     driver.get(pages.formPage);